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656 Articles Related To: previous page < results 1 - 100 >
Modification of optically active ferrocenylphosphine ligands for palladium-catalyzed asymmetric allylic alkylation
Tetrahedron Letters, Volume 27, Issue 2, 1986, Pages 191-194
Tamio Hayashi, Akihiro Yamamoto, Toshiya Hagihara, Yoshihiko Ito
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1. You are entitled to access the full text of this document
Novel chiral phosphine–oxazinane ligands in palladium-catalyzed asymmetric allylic alkylation
Tetrahedron Letters, Volume 42, Issue 29, 16 July 2001, Pages 4837-4839
Takashi Mino, Sosuke Hata, Kouji Ohtaka, Masami Sakamoto, Tsutomu Fujita
Application of novel chiral phosphine–oxazinane such as 5b (R=n-Pr) to the title reaction led to good enantioselectivies (up to 95% ee).
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2. You are entitled to access the full text of this document
A novel P-chirogenic phosphine ligand, (S,S)-1,2-bis-[(ferrocenyl)methylphosphino]ethane: synthesis and use in rhodium-catalyzed asymmetric hydrogenation and palladium-catalyzed asymmetric allylic alkylation
Tetrahedron: Asymmetry, Volume 14, Issue 15, 1 August 2003, Pages 2171-2175
Nobuhiko Oohara, Kosuke Katagiri, Tsuneo Imamoto

Graphical Abstract


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3. You are entitled to access the full text of this document
Palladium-catalyzed asymmetric allylic substitution using planar chiral hydrazone ligands
Journal of Organometallic Chemistry, Volume 665, Issues 1-2, 3 January 2003, Pages 122-126
Takashi Mino, Teruhiro Ogawa, Masakazu Yamashita

Graphical Abstract

Planar chiral phosphine-hydrazones were easily prepared from (S)-α-(diphenyl-phosphino)ferrocenecarboxaldehyde with chiral hydrazines. Palladium-catalyzed asymmetric allylic substitution has been successfully carried out in the presence of planar chiral phosphine-hydrazone ligand such as 2a with dimethyl malonate in good yield with good enantioselectivity (up to 96% ee).
image

4. You are entitled to access the full text of this document
Modular chiral β-selenium-, sulfur-, and tellurium amides: synthesis and application in the palladium-catalyzed asymmetric allylic alkylation
Tetrahedron, Volume 64, Issue 2, 7 January 2008, Pages 392-398
Fabrício Vargas, Jasquer A. Sehnem, Fabio Z. Galetto, Antonio L. Braga

Graphical abstract

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5. You are entitled to access the full text of this document
Synthesis of novel ferrocenylphosphine–amidine ligands and their application in Pd-catalyzed asymmetric allylic alkylation
Tetrahedron Letters, Volume 43, Issue 50, 9 December 2002, Pages 9179-9182
Xiangping Hu, Huilin Chen, Xinquan Hu, Huicong Dai, Changmin Bai, Junwei Wang, Zhuo Zheng
Graphic
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6. You are entitled to access the full text of this document
Role of the planar chirality of imine–phosphine hybrid ligands bearing chromium tricarbonyl in the palladium-catalyzed asymmetric allylic alkylation
Tetrahedron Letters, Volume 41, Issue 26, 24 June 2000, Pages 5083-5087
Hye-Young Jang, Hwimin Seo, Jin Wook Han, Young Keun Chung
7. You are entitled to access the full text of this document
Chiral β-phosphino sulfoxides as chiral ligands in palladium-catalyzed asymmetric allylic nucleophilic substitution reactions
Tetrahedron Letters, Volume 40, Issue 4, 22 January 1999, Pages 715-718
Kunio Hiroi, Yoshio Suzuki, Ryoko Kawagishi
Graphic
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8. You are entitled to access the full text of this document
Palladium-catalyzed asymmetric allylic alkylation with an indenide
Tetrahedron: Asymmetry, Volume 15, Issue 3, 9 February 2004, Pages 545-548
Tamio Hayashi, Toshimasa Suzuka, Atsushi Okada, Motoi Kawatsura
Graphic
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(R)-1,3-Diphenyl-3-(3H-inden-1-yl)propene

C24H20

Ee>99% (by preparation method)

[α]D20=−74.3 (c 1.02, CHCl3)

Source of chirality: chiral catalyst

Absolute configuration: R

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Dichloro-bis[1-{(R)-1,3-diphenyl-2-propenyl}indenyl]zirconium(IV)

C48H38Cl2Zr

Ee>99% (by preparation method)

[α]D20=+95.2 (c 0.96, CHCl3)

Source of chirality: chiral catalyst

Absolute configuration: R,R

9. You are entitled to access the full text of this document
Palladium-catalyzed asymmetric allylic substitution using novel phosphino-ester (PHEST) ligands with 1,1′-binaphthyl skeleton
Tetrahedron: Asymmetry, Volume 11, Issue 19, 6 October 2000, Pages 4009-4015
Hidehiko Kodama, Toshiji Taiji, Tetsuo Ohta, Isao Furukawa
10. You are entitled to access the full text of this document
Synthesis of a novel type of chiral phosphinocarboxylic acids. The phosphine-palladium complexes catalyzed asymmetric allylic alkylation
Tetrahedron: Asymmetry, Volume 2, Issue 7, 1991, Pages 667-682
Yoshiharu Okada, Toru Minami, Yasuo Umezu, Shinji Nishikawa, Ryoji Mori, Yutaka Nakayama

Stereochemistry Abstract


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trans-(2-Diphenylphosphino)cyclobutanecarboxylic acid

C17H17O2P

(−)-Form: optical PURITY=96 %ee [α]D=−90.1 (c 6.3, CH2Cl2)

(+)-Form: optical PURITY=92 %ee [α]D=86.5 (c 2.2, CH2Cl2)

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trans-[2-(Diphenylphosphino)cyclobutyl]acetic acid

C18H19O2P

(+)-Form: optical PURITY=>99 %ee [α]D=24.1 (c 1.6, CH2Cl2)

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trans-(2-Diphenylphosphino)cyclopentanecarboxytic acid

C18H19O2P

(−)-Form: optical PURITY=83 %ee [α]D=−29.6 (c 1.8, CH2Cl2)

(+)-Form: optical PURITY=95 %ee [α]D=31.4 (c 1.0, CH2Cl2)

image

trans-[2-(Diphenylphosphino)cyclopentyl]acetic acid

C18H19O2P

(−)-Form: optical PURITY=94 %ee [α]D=−2.69 (c 1.0, CH2Cl2)

(+)-Form: optical PURITY=97 %ee [α]D=6.79 (c 1.0, CH2Cl2)

11. You are entitled to access the full text of this document
The first synthesis of chiral phosphinocarboxylic acid ligands, trans-2-(diphenylphosphino)cycloalkanecarboxylic acids. The phosphine-palladium complexes catalyzed asymmetric allylic alkylation
Tetrahedron Letters, Volume 31, Issue 27, 1990, Pages 3905-3908
Yoshiharu Okada, Toru Minami, Yoritaka Sasaki, Yasuo Umezu, Masahiko Yamaguchi

Graphical Abstract


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Palladium-catalyzed asymmetric allylic alkylation with an enamine as the nucleophilic reagent
Tetrahedron Letters, Volume 48, Issue 43, 22 October 2007, Pages 7591-7594
Delong Liu, Fang Xie, Wanbin Zhang

Graphical abstract


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Novel ferrocenylphosphine-imines containing a pyridine unit as a new family of chiral ligands: the important influence of the position of the pyridine N-atom on the reactivity and enantioselectivity in palladium-catalyzed asymmetric allylic alkylations
Tetrahedron: Asymmetry, Volume 15, Issue 7, 5 April 2004, Pages 1065-1068
Xiangping Hu, Huicong Dai, Changmin Bai, Huilin Chen, Zhuo Zheng

Graphical Abstract


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Stereochemistry Abstract


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(R)-N-(Pyridin-2-methylene)-1-[(S)-2-(diphenylphosphino)ferrocenyl]ethylamine

C30H27FeN2P Ee >98% [α]D25=−378 (c 0.15, CHCl3) Source of chirality: (R)-1-[(S)-2-(diphenylphosphino)ferrocenyl]ethylamine Absolute configuration: central chirality: R, planar chirality: S

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Synthesis and use in palladium-catalyzed asymmetric allylic alkylation of new planar chiral chromium complexes of 1,2-disubstituted arenes having pyridine and aryl phosphine groups
Tetrahedron: Asymmetry, Volume 10, Issue 15, 30 July 1999, Pages 2853-2861
Jin Wook Han, Hye-Young Jang, Young Keun Chung
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Enamines: efficient nucleophiles for the palladium-catalyzed asymmetric allylic alkylation
Tetrahedron, Volume 65, Issue 2, 10 January 2009, Pages 512-517
Xiaohu Zhao, Delong Liu, Fang Xie, Wanbin Zhang

Graphical abstract


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New homochiral phosphine ligands having a hexahydro-1H-pyrrolo[1,2-c]imidazolone backbone: preparation and use for palladium-catalyzed asymmetric alkylation of cycloalkenyl carbonates
Tetrahedron: Asymmetry, Volume 13, Issue 16, 27 August 2002, Pages 1769-1772
Kazutaka Shibatomi, Yasuhiro Uozumi

Graphical Abstract


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Stereochemistry Abstracts


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(3R,7aS)-(3-(2-Diphenylphosphinophenyl)-2-phenyl)hexahydro-1H-pyrrolo[1,2-c]imidazol-1-one

C30H27N2OP

E.e. >99%

[α]D19=+44 (c 1.4, chloroform)

Source of chirality:

image
-proline
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(3R,7aS)-(3-(2-Diphenylphosphino)phenyl-6-hydroxy-2-phenyl)hexahydro-1H-pyrrolo[1,2-c]imidazol-1-one

C30H27N2OP

E.e. >99%

[α]D19=+9 (c 1.6, chloroform)

Source of chirality: trans-4-hydroxy-

image
-proline
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(3S,9aS)-(3-(2-Diphenylphosphino)phenyl-2-phenyl)tetrahydro-1H-imidazo[1,5-a]indole-1-one

C34H27N2OP

E.e. >99%

[α]D25=+135 (c 1.0, chloroform)

Source of chirality: (S)-indoline-2-carboxylic acid

image

(3S,9aS)-(3-(2-Diphenylphosphino)phenyl-2-phenyl)tetrahydro-1H-imidazo[1,5-a]indole-1-one

C34H27N2OP

E.e. >99%

[α]D19=+127 (c 0.7, chloroform)

Source of chirality: (S)-indoline-2-carboxylic acid

image

(3R,10aS)-(3-(2-Diphenylphosphino)phenyl-2-phenyl)tetrahydro-1H,5H-imidazo[1,5-b]isoquinoline-1-one

C35H29N2OP

E.e. >99%

[α]D25=+6 (c 0.5, chloroform)

Source of chirality: (S)-1,2,3,4-tetrahydro-3-isoquinolinecarboxylic acid

17. You are entitled to access the full text of this document
Palladium-catalyzed asymmetric allylic alkylation using chiral hydrazone ligands with ferrocene skeleton
Journal of Organometallic Chemistry, Volume 689, Issue 17, 1 September 2004, Pages 2833-2836
Takashi Mino, Hiroshi Segawa, Masakazu Yamashita
Chiral phosphine–hydrazones 3 were easily prepared from 1′-(diphenylphosphino)-1-ferrocenecarboxaldehyde with chiral hydradines. Palladium-catalyzed asymmetric allylic alkylation of 1,3-diphenyl-2-propenyl acetate (4) with a various malonate–BSA–LiOAc system has been successfully carried out in the presence of 3a in good yields with good enantioselectivities (up to 84% ee).
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Asymmetric allylic alkylation catalyzed by palladium complexes with atropisomeric quinazolinone phosphine ligands
Tetrahedron Letters, Volume 40, Issue 7, 12 February 1999, Pages 1245-1248
Xuedong Dai, Scott Virgil

Graphical Abstract

Asymmetric inductions up to 52% ee and 87% ee have been achieved with palladium catalyzed allylic alkylation reactions using a new class of atropisomeric monodentate ((R)-1b) and chelate (2) quinazolinone phosphine ligands, respectively.
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Asymmetric allylic alkylation catalyzed by palladium complexes with a new chiral bisphosphine ligand
Tetrahedron Letters, Volume 38, Issue 3, 20 January 1997, Pages 375-378
James M. Longmire, Guoxin Zhu, Xumu Zhang

Graphical Abstract


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Preparation of a new FerroPHOS derivative for palladium-catalyzed asymmetric allylic alkylations
Tetrahedron: Asymmetry, Volume 12, Issue 1, 5 February 2001, Pages 33-35
Jahyo Kang, Jun Hee Lee, Jung Sun Choi

Graphical Abstract


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Stereochemistry Abstracts


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(pS,pS)-1,1′-Bis(diphenylphosphino)-2,2′-di[(1-methoxy-1-methyl)]ethylferrocene

C42H44FeO2P2

[α]D29 −9.33 (c 0.54, CHCl3)

Source of chirality: asymmetric synthesis

Absolute configuration: (pS,pS)

image

(−)-(S)-Dimethyl (1,3-diphenylprop-2-en-1-yl)malonate

C20H20O4

Ee=96.3%

[α]D27=−19.6 (c 1.4, EtOH)

Source of chirality: asymmetric synthesis

Absolute configuration: (S)

21. You are entitled to access the full text of this document
New chiral phosphinooxathiane ligands for palladium-catalyzed asymmetric allylic substitution reactions
Tetrahedron Letters, Volume 41, Issue 23, 12 June 2000, Pages 4615-4618
Hiroto Nakano, Yuko Okuyama, Hiroshi Hongo*
22. You are entitled to access the full text of this document
Chiral ferrocene-based phosphine-imine and sulfur-imine ligands for palladium-catalyzed asymmetric allylic alkylation of cycloalkenyl esters
Journal of Molecular Catalysis A: Chemical, Volume 218, Issue 1, 17 August 2004, Pages 107-112
Xiangping Hu, Changmin Bai, Huicong Dai, Huilin Chen, Zhuo Zheng

Graphical Abstract

Chiral ferrocene-based phosphine-imine and sulfur-imine ligands for palladium-catalyzed asymmetric allylic alkylation of cycloalkenyl esters.
image

23. You are entitled to access the full text of this document
Asymmetric allylic alkylation of cycloalkenediol diacetates using a chiral phosphine ligand bearing a carboxyl group
Tetrahedron: Asymmetry, Volume 11, Issue 6, 7 April 2000, Pages 1397-1403
Tatsuo Okauchi, Kouji Fujita, Tsuneyuki Ohtaguro, Satomi Ohshima, Toru Minami*
24. You are entitled to access the full text of this document
Asymmetric allylic alkylation catalyzed by palladium complexes with new chiral ligands
Tetrahedron Letters, Volume 37, Issue 26, 24 June 1996, Pages 4475-4478
Guoxin Zhu, Michael Terry, Xumu Zhang

Graphical Abstract


image

25. You are entitled to access the full text of this document
(−)-α-Isosparteine as a chiral ligand in asymmetric allylic alkylation
Tetrahedron: Asymmetry, Volume 5, Issue 7, July 1994, Pages 1347-1352
Jahyo Kang, Won Oh Cho, Hyung^Geun Cho
Graphic
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Methyl (R)-2-carbomethoxy-3,5-diphenylpent-4-enoate

Compound formula

E.e = 88%

[α]D22 = +11.98 (c = 0.69, EtOH)

Source of chirality: asymm. syn.

Absolute configuration: R

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Methyl (R)-carbomethoxy-3-methylhex-4-enoate

Compound formula

E.e = 60%

[α]D22 = +15.43 (c = 0.92, CHCl3)

Source of chirality: asymm. syn.

Absolute configuration: R

image

Dimethyl (S)-2-cyclohexen-1-ylmalonate

Compound formula

E.e = 62%

[α]D22 = −8.69 (c = 1.36, CH2Cl2)

Source of chirality: asymm. syn.

Absolute configuration: S

26. You are entitled to access the full text of this document
β-Hydroxy and β-(o-diphosphino)benzoyloxy(o-diphosphino) benzamides as ligands for asymmetric allylic alkylation
Tetrahedron: Asymmetry, Volume 20, Issue 10, 5 June 2009, Pages 1132-1137
Geetanjali S. Mahadik, Stanley A. Knott, Lisa F. Szczepura, Shawn R. Hitchcock

Graphical abstract


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2-(Diphenylphosphino)-N-(1R,2S)-1-hydroxy-1-hydroxy-1-phenyl-2-propyl)benzamide

C28H25NO2P

image
(c 0.10, CHCl3)

Source of chirality: (1R,2S)-norephedrine

Absolute configuration: (1R,2S)

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2-(Diphenylphosphino)-N-(1S,2S)-1-hydroxy-1-hydroxy-1-phenyl-2-propyl)benzamide

C28H25NO2P

image
(c 0.10, CHCl3)

Source of chirality: (1S,2S)-pseudo norephedrine

Absolute configuration: (1S,2S)

image

(1R,2S)-2-(2-Diphenylphosphino)benzamido)-1-phenylpropyl 2-(diphenylphosphino)benzoate

C47H39NO3P2

image
(c 0.10, CHCl3)

Source of chirality: (1R,2S)-norephedrine

Absolute configuration: (1R,2S)

image

(1S,2S)-2-(2-Diphenylphosphino)benzamido)-1-phenylpropyl 2-(diphenylphosphino)benzoate

C47H39NO3P2

image
(c 0.10, CHCl3)

Source of chirality: (1S,2S)-pseudonorephedrine

Absolute configuration: (1S,2S)

27. You are entitled to access the full text of this document
Readily available phosphine–imine ligands from α-phenylethylamine for highly efficient Pd-catalyzed asymmetric allylic alkylation
Journal of Molecular Catalysis A: Chemical, Volume 270, Issues 1-2, 1 June 2007, Pages 127-131
Jia-Di Huang, Xiang-Ping Hu, Sai-Bo Yu, Jun Deng, Dao-Yong Wang, Zheng-Chao Duan, Zhuo Zheng

Graphical abstract

A series of chiral phosphine–imine ligands have been prepared through a two-step transformation from chiral α-phenylethylamine and successfully applied in the Pd-catalyzed asymmetric allylic alkylation of 1,3-diphenylprop-2-en-1-yl pivalate with dimethyl malonate, in which up to 94% ee and 99% conversions were obtained.
image
28. You are entitled to access the full text of this document
Microwave-mediated palladium-catalyzed asymmetric allylic alkylation; an example of highly selective fast chemistry
Journal of Organometallic Chemistry, Volume 603, Issue 1, 22 May 2000, Pages 2-5
Nils-Fredrik K. Kaiser, Ulf Bremberg, Mats Larhed, Christina Moberg*, Anders Hallberg*
29. You are entitled to access the full text of this document
Reversal in enantioselectivity for the palladium-catalyzed asymmetric allylic substitution with novel metallocene-based planar chiral diphosphine ligands
Tetrahedron Letters, Volume 49, Issue 6, 4 February 2008, Pages 1012-1015
Fang Xie, Delong Liu, Wanbin Zhang

Graphical abstract


image

30. You are entitled to access the full text of this document
New chiral phosphinooxazolidine ligands for palladium-catalyzed asymmetric allylic substitution
Tetrahedron Letters, Volume 40, Issue 28, 9 July 1999, Pages 5197-5198
Myung-Jong Jin, Jung-Ae Jung, Sang-Han Kim

Graphical Abstract


image

31. You are entitled to access the full text of this document
New chiral phosphinoimidazolidine ligand in palladium-catalyzed asymmetric allylic substitution
Tetrahedron Letters, Volume 43, Issue 41, 7 October 2002, Pages 7409-7411
Myung-Jong Jin, Sang-Han Kim, Sang-Joon Lee, Young-Mok Kim
Graphic
image

32. You are entitled to access the full text of this document
Palladium-catalyzed asymmetric intramolecular allylation forming optically active vinylcyclopropane and vinyldihydrofurans
Tetrahedron Letters, Volume 29, Issue 6, 1988, Pages 669-672
Tamio Hayashi, Akihiro Yamamoto, Yoshihiko Ito

Graphical Abstract


image

33. You are entitled to access the full text of this document
Simple d-glucosamine-based phosphine-imine and phosphine-amine ligands in Pd-catalyzed asymmetric allylic alkylations
Tetrahedron Letters, Volume 49, Issue 47, 17 November 2008, Pages 6635-6638
Katarzyna Glegoła, Sine A. Johannesen, Laura Thim, Catherine Goux-Henry, Troels Skrydstrup, Eric Framery

Graphical abstract


image

34. You are entitled to access the full text of this document
C–C Bond Formation (Part 2) by Substitution Reactions: Allylic Alkylation
Comprehensive Organometallic Chemistry III, 2007, Chapter 11.03, Pages 75-122
Y. Nishibayashi, S. Uemura
35. You are entitled to access the full text of this document
Palladium-catalyzed allylic alkylation of tert-butyl(diphenylmethylene)-glycinate with simple allyl esters under chiral phase transfer conditions
Tetrahedron: Asymmetry, Volume 12, Issue 11, 4 July 2001, Pages 1567-1571
Guoshu Chen, Yijian Deng, Liuzhu Gong, Aiqiao Mi, Xin Cui, Yaozhong Jiang, Michael C. K. Choi, Albert S. C. Chan

Graphical Abstract


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36. You are entitled to access the full text of this document
Chiral P,O-ligands derived from N,O-phenylene prolinols for palladium-catalyzed asymmetric allylic alkylation
Tetrahedron Letters, Volume 48, Issue 10, 5 March 2007, Pages 1703-1706
Biao Jiang, Zuo-Gang Huang

Graphical abstract


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37. You are entitled to access the full text of this document
Total synthesis of rac-longamide B
Tetrahedron Letters, Volume 48, Issue 19, 7 May 2007, Pages 3459-3461
Xue-Tong Sun, Austin Chen

Graphical abstract


image

38. You are entitled to access the full text of this document
Palladium-catalyzed asymmetric allylic substitution with a cyclopentadienide: asymmetric synthesis of metallocenes
Tetrahedron: Asymmetry, Volume 14, Issue 4, 21 February 2003, Pages 511-515
Toshimasa Suzuka, Motoi Kawatsura, Atsushi Okada, Tamio Hayashi

Graphical Abstract


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Stereochemistry Abstracts


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1,1′-Bis((R)-1,3-diphenyl-2-propenyl)ferrocene

C40H34Fe

E.e. >99% (by preparation method)

[α]D20=−249 (c 1.0, CHCl3)

Source of chirality: chiral catalyst

Absolute configuration: R,R

image

1,1′-Bis((R)-1,3-diphenyl-2-propenyl)zirconocene dichloride

C40H34Cl2Zr

E.e. >99% (by preparation method)

[α]D20=−119 (c 1.0, CHCl3)

Source of chirality: chiral catalyst

Absolute configuration: R,R

image

1,1′-Bis((R)-1,3-diphenyl-2-propenyl)titanocene dichloride

C40H34Cl2Ti

E.e. >99% (by preparation method)

[α]D20=+133 (c 1.0, CHCl3)

Source of chirality: chiral catalyst

Absolute configuration: R,R

39. You are entitled to access the full text of this document
Development of chiral phosphine ligands bearing a carboxyl group and their application to catalytic asymmetric reaction
Tetrahedron: Asymmetry, Volume 6, Issue 10, October 1995, Pages 2469-2474
Toru Minami, Yoshiharu Okada, Tsuneyuki Otaguro, Seiji Tawaraya, Tomohiro Furuichi, Tatsuo Okauchi

Graphical Abstract

A new chiral phosphine ligand is effective for asymmetric allylic alkylations of cyclic cis-allylic acetates.
image

40. You are entitled to access the full text of this document
Ir-catalyzed asymmetric allylic alkylation using chiral diaminophosphine oxides: DIAPHOXs. Formal enantioselective synthesis of (−)-paroxetine
Tetrahedron Letters, Volume 48, Issue 29, 16 July 2007, Pages 4977-4981
Tetsuhiro Nemoto, Tatsurou Sakamoto, Takashi Fukuyama, Yasumasa Hamada

Graphical abstract


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41. You are entitled to access the full text of this document
P-stereogenic P/N hybrid ligands: a remarkable switch in enantioselectivity in palladium-catalyzed asymmetric allylation
Tetrahedron Letters, Volume 45, Issue 3, 12 January 2004, Pages 603-606
Hiroshi Danjo, Masato Higuchi, Mitsuhiro Yada, Tsuneo Imamoto
Graphic
image

42. You are entitled to access the full text of this document
Novel chiral P,O-ligands for homogeneous Pd(0) catalysed asymmetric allylic alkylation reactions
Tetrahedron: Asymmetry, Volume 19, Issue 4, 4 March 2008, Pages 454-458
Vanda Raquel Marinho, Ana Isabel Rodrigues, Anthony J. Burke

Graphical abstract


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(S)-N-(2-Hydroxy-1-phenylethyl)-2-(diphenylphosphino)benzamide 5a

C27H24NO2P

image
(c 0.41, CHCl3)

Source of chirality: (S)-phenylglycine

Absolute configuration: (S)

image

(S)-N-(1-Benzyl-2-hydroxyethyl)-2-(diphenylphosphino)benzamide 5b

C28H26NO2P

image
(c 0.55, CHCl3)

Source of chirality: (S)-phenylalanine

Absolute configuration: (S)

43. You are entitled to access the full text of this document
Thioether containing ligands for asymmetric allylic substitution reactions
Comptes Rendus Chimie, Volume 10, Issue 3, March 2007, Pages 188-205
Erika Martin, Montserrat Diéguez
44. You are entitled to access the full text of this document
A third generation chiral phosphorus-containing dendrimer as ligand in Pd-catalyzed asymmetric allylic alkylation
Tetrahedron Letters, Volume 46, Issue 38, 19 September 2005, Pages 6503-6506
Régis Laurent, Anne-Marie Caminade, Jean-Pierre Majoral

Graphical abstract

In situ complexation of a dendrimer possessing 24 chiral iminophosphine end groups affords a [Pd]-catalyst usable for asymmetric allylic alkylations. This dendritic catalyst gives very good ee and can be easily recovered and reused twice with almost the same efficiency.
image

45. You are entitled to access the full text of this document
Preparation of α-substituted allylboronates by chemoselective iridium-catalyzed asymmetric allylic alkylation of 1-propenylboronates
Tetrahedron Letters, Volume 48, Issue 18, 30 April 2007, Pages 3305-3309
Feng Peng, Dennis G. Hall

Graphical abstract


image

46. You are entitled to access the full text of this document
Palladium-catalyzed asymmetric alkylation via π-allyl intermediate: Acetamidomalonate ester as a nucleophile.
Tetrahedron Letters, Volume 31, Issue 35, 1990, Pages 5049-5052
Motowo Yamaguchi, Toshihide Shima, Takamichi Yamagishi, Mitsuhiko Hida

Graphical Abstract


image

47. You are entitled to access the full text of this document
Chiral sulfoxide ligands bearing nitrogen atoms as stereocontrollable coordinating elements in palladium-catalyzed asymmetric allylic alkylations
Tetrahedron: Asymmetry, Volume 9, Issue 21, 6 November 1998, Pages 3797-3817
Kunio Hiroi, Yoshio Suzuki, Ikuko Abe, Yutaka Hasegawa, Kenji Suzuki
48. You are entitled to access the full text of this document
New chiral o-(phosphinoamido)phenyl sulfoxide ligands in palladium-catalyzed asymmetric allylic alkylations
Tetrahedron Letters, Volume 39, Issue 36, 3 September 1998, Pages 6499-6502
Kunio Hiroi, Yoshio Suzuki
Graphic
image

49. You are entitled to access the full text of this document
Palladium-catalyzed asymmetric telomerization of isoprene. Preparation of optically active citronellol
Journal of Organometallic Chemistry, Volume 232, Issue 1, 8 June 1982, Pages 89-98
Masanobu Hidai, Haruyoshi Mizuta, Hiroshi Yagi, Yozo Nagai, Kenji Hata, Yasuzo Uchida
50. You are entitled to access the full text of this document
Asymmetric allylic alkylation catalyzed by palladium-sparteine complexes
Tetrahedron: Asymmetry, Volume 2, Issue 7, 1991, Pages 683-690
Antonio Togni

Stereochemistry Abstract


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3-Allyl)(Sparteine)palladium(II) Hexafluorophosphate

C18H31F6N2PPd

E.e.=100 %

[α]22D=−67 (c=1.035, CH2Cl2)

Source of chirality: natural

Absolute configuration (of natural (−)-sparteine): 6R,7S,9S,11S

51. You are entitled to access the full text of this document
Pd-catalyzed asymmetric allylic alkylation with nitromethane using a chiral diaminophosphine oxide: (S,RP)-Ph-DIAPHOX. Enantioselective synthesis of (R)-preclamol and (R)-baclofen
Tetrahedron Letters, Volume 47, Issue 37, 11 September 2006, Pages 6577-6581
Tetsuhiro Nemoto, Long Jin, Hiroshi Nakamura, Yasumasa Hamada

Graphical abstract


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52. You are entitled to access the full text of this document
New chiral phosphine–amide ligands in palladium-catalysed asymmetric allylic alkylations
Tetrahedron: Asymmetry, Volume 12, Issue 2, 19 February 2001, Pages 287-291
Takashi Mino, Kohki Kashihara, Masakazu Yamashita

Graphical Abstract


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Stereochemistry Abstracts


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(S)-N-(1-Benzyl-2-methoxyethyl)-2-(diphenylphosphino)benzamide

C29H28NO2P

Ee=>95%

[α]D20=−14.5 (c 0.80, CHCl3)

Source of chirality: (S)-(+)-2-amino-1-methoxy-3-phenylpropane

Absolute configuration: S

image

(S)-N-(1-Benzyl-2-methoxyethyl)-2-hydroxynaphthalenecarboxamide

C21H21NO3

Ee=>95%

[α]D25=−54.4 (c 0.16, CHCl3)

Source of chirality: (S)-(+)-2-amino-1-methoxy-3-phenylpropane

Absolute configuration: S

image

(S)-N-(1-Benzyl-2-methoxyethyl)-2-(trifluoromethanesulfonyloxy)naphthalenecarboxamide

C22H20F3NO5S

Ee=>95%

[α]D25=−23.7 (c 0.35, CHCl3)

Source of chirality: (S)-(+)-2-amino-1-methoxy-3-phenylpropane

Absolute configuration: S

image

(S)-N-(1-Benzyl-2-methoxyethyl)-2-(diphenylphosphino)naphthalenecarboxamide

C33H30NO2P

Ee=>95%

[α]D25=−18.7 (c 0.17, CHCl3)

Source of chirality: (S)-(+)-2-amino-1-methoxy-3-phenylpropane

Absolute configuration: S

53. You are entitled to access the full text of this document
Application of phosphinous amide ligands in palladium complex-catalyzed asymmetric allylic alkylation: influence of steric effects on enantioselectivity
Tetrahedron: Asymmetry, Volume 15, Issue 2, 26 January 2004, Pages 213-217
Xuanhua Chen, Rongwei Guo, Yueming Li, Gang Chen, Chi-Hung Yeung, Albert S. C. Chan

Graphical Abstract


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Stereochemistry Abstracts


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(R)-2,2-Bis[bis(3,5-dimethylphenyl)phosphinoamino]-5,5,6,6,7,7,8,8-octohydro-1,1-binaphthyl

C52H58N2P2Absolute configuration: (R)[α]20D=+3.3 (c 1.0, THF)Source of chirality: (R)-H8-BINAM

54. You are entitled to access the full text of this document
Enantioselective palladium catalyzed allylic alkylation with phosphorus-containing C2-symmetric chiral amine ligands
Tetrahedron Letters, Volume 35, Issue 36, 5 September 1994, Pages 6689-6692
Hideki Kubota, Kenji Koga

Graphical Abstract


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55. You are entitled to access the full text of this document
Asymmetric allylic alkylation using a polymer-supported palladium catalyst in the presence of chiral ligands
Journal of Molecular Catalysis A: Chemical, Volume 201, Issues 1-2, 1 July 2003, Pages 131-135
Maria Michela Dell’Anna, Piero Mastrorilli, Cosimo Francesco Nobile, Gian Paolo Suranna

Graphical Abstract

Polymer-supported Pd(AAEMA)2 [AAEMA: deprotonated form of 2-(acetoacetoxy)ethyl methacrylate] in the presence of chiral ligands catalyses the asymmetric substitution of rac-1,3-diphenyl-2-propenyl acetate with dimethyl malonate.
image

56. You are entitled to access the full text of this document
Synthesis of optically active α-hydroxy ketones by enantioselective oxidation of silyl enol ethers with a fructose-derived dioxirane
Tetrahedron: Asymmetry, Volume 9, Issue 3, 13 February 1998, Pages 397-401
Waldemar Adam, Rainer T. Fell, Chantu R. Saha-Möller, Cong-Gui Zhao
57. You are entitled to access the full text of this document
Synthesis of optically active α-sulfinylacetaldehyde
Tetrahedron Letters, Volume 29, Issue 51, 1988, Pages 6775-6778
P. Pflieger, C. Mioskowski, J. P. Salaun, D. Weissbart, F. Durst

Graphical Abstract

Optically active α-sulfinylacetaldehyde is prepared by formylation of the (R)-methyl p-tolysulfoxide anion with N-formylpiperidine.
image

58. You are entitled to access the full text of this document
Optically active pyrazolylborate: synthesis, characterization and uses in enantioselective cyclopropanation reaction
Journal of Molecular Catalysis A: Chemical, Volume 185, Issues 1-2, 8 July 2002, Pages 33-39
Udai P. Singh, Preeti Babbar, Bernd Hassler, H. Nishiyama, H. Brunner

Graphical Abstract

Optically active tetrakis- and hydrotris(pyrazolyl)borate have been synthesized by the reaction of 4,5,6,7-tetrahydro-7,8,8-trimethyl-2H-4,7-methanoindazole/(−)-3(5)-methyl-1-phenylethylaminomethylpyrazole with NaBH4 in 1:4/1:3 ratio, respectively. These ligands have been used in various metal-catalysed enantioselective cyclopropanation reactions. The maximum ee was reported 62% for cis isomer and 42% for trans isomer.
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59. You are entitled to access the full text of this document
New chiral ligands, pyrrolidinyl- and 2-azanorbornyl- phosphinooxazolidines for palladium-catalyzed asymmetric allylation
Tetrahedron: Asymmetry, Volume 11, Issue 5, 24 March 2000, Pages 1193-1198
Yuko Okuyama, Hiroto Nakano, Hiroshi Hongo *
60. You are entitled to access the full text of this document
Pd-catalyzed enantioselective synthesis of quaternary α-amino acid derivatives using a phenylalanine-derived P-chirogenic diaminophosphine oxide
Tetrahedron Letters, Volume 48, Issue 36, 3 September 2007, Pages 6304-6307
Tetsuhiro Nemoto, Teisuke Harada, Takayoshi Matsumoto, Yasumasa Hamada

Graphical abstract


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61. You are entitled to access the full text of this document
Pd-catalyzed asymmetric allylic alkylation using furanoside diphosphinite ligands
Inorganica Chimica Acta, Volume 358, Issue 13, 1 September 2005, Pages 3824-3828
Eugeni Guimet, Montserrat Diéguez, Aurora Ruiz, Carmen Claver

Graphical abstract

Furanoside diphosphinite ligands were tested in the Pd-catalyzed allylic alkylation. Enantiomeric excesses of up to 31% with good activities were obtained. Our results show that the absolute configuration at carbon C-3 of the carbohydrate backbone controlled the sense of enantioselectivity. Models for asymmetric induction are discussed based on the absolute stereochemistry of the product.
image

62. You are entitled to access the full text of this document
The use of a new carboranylamidophosphite ligand in the asymmetric Pd-catalysed allylic alkylation in organic solvents and supercritical carbon dioxide
Journal of Organometallic Chemistry, Volume 694, Issue 19, 1 September 2009, Pages 3047-3049
Sergey E. Lyubimov, Ilya V. Kuchurov, Andrei A. Vasil’ev, Andrey A. Tyutyunov, Valery N. Kalinin, Vadim A. Davankov, Sergei G. Zlotin

Graphical abstract

A novel P-monodentate ligand based on carboranyl alcohol and (S)-2-(anilinomethyl)pyrrolidine provides high enantioselectivities (ee’s up to 95%) in the Pd-catalyzed allylic alkylation of (E)-1,3-diphenylallyl acetate. The first example of the Pd-catalysed allylic alkylation in supercritical carbon dioxide is also described.
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63. You are entitled to access the full text of this document
Palladium-catalyzed allylic alkylation of optically active α-alkenyl-α-acyloxytrialkylsilane
Tetrahedron Letters, Volume 46, Issue 30, 25 July 2005, Pages 5009-5012
Kazuhiko Sakaguchi, Takeshi Yamada, Yasufumi Ohfune

Graphical abstract


image

64. You are entitled to access the full text of this document
Kinetic resolution of allylic esters in palladium-catalyzed asymmetric allylic alkylations using C–N bond axially chiral aminophosphine ligands
Tetrahedron: Asymmetry, Volume 19, Issue 23, 1 December 2008, Pages 2711-2716
Takashi Mino, Kazuya Wakui, Shunsuke Oishi, Youtaro Hattori, Masami Sakamoto, Tsutomu Fujita

Graphical abstract


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(R)-1,3-Diphenylprop-2-en-1-yl acetate

C17H16O2

Ee = 95% (chiral HPLC)

image
(c 0.30, CHCl3)

Source of chirality: asymmetric synthesis

Absolute configuration: (R)

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(R)-1,3-Diphenylprop-2-en-1-yl pivalate

C20H22O2

Ee = 55% (chiral HPLC)

image
(c 0.35, CHCl3)

Source of chirality: asymmetric synthesis

Absolute configuration: (R)

image

(R)-1,3-Diphenylprop-2-en-1-yl benzoate

C22H18O2

Ee = 59% (chiral HPLC)

image
(c 0.30, CHCl3)

Source of chirality: asymmetric synthesis

Absolute configuration: (R)

65. You are entitled to access the full text of this document
New monodentate chiral phosphine 2,6-dimethyl-9-phenyl-9-phosphabicyclo[3.3.1]nonane(9-PBN): Application to asymmetric allylic substitution reaction
Tetrahedron Letters, Volume 37, Issue 42, 14 October 1996, Pages 7565-7568
Yasumasa Hamada, Noriko Seto, Hiroki Ohmori, Keiichiro Hatano

Graphical Abstract


image

66. You are entitled to access the full text of this document
Chiral, bicyclic proline derivatives and their application as ligands for copper in the catalytic asymmetric allylic oxidation of olefins
Tetrahedron Letters, Volume 37, Issue 42, 14 October 1996, Pages 7577-7580
Mikael J. Södergren, Pher G. Andersson

Graphical Abstract

Chiral, optically pure, bicyclic amino acids 7 and 8 have been prepared and evaluated as ligands for the copper-catalyzed asymmetric allylic benzoyloxylation of cyclic olfins. Optically active 2-cyclohexenyl benzoate was obtained from cyclohexene in 67% yield and up to 65% e.e.
image

67. You are entitled to access the full text of this document
Asymmetric allylic oxidation of cycloalkenes using a tridentate tris(oxazoline) ligand as a chiral auxiliary
Tetrahedron Letters, Volume 41, Issue 20, 21 May 2000, Pages 3941-3945
Yoshinori Kohmura, Tsutomu Katsuki
68. You are entitled to access the full text of this document
Asymmetric allylic amination catalyzed by chiral ferrocenylphosphine-palladium complexes
Tetrahedron Letters, Volume 31, Issue 12, 1990, Pages 1743-1746
Tamio Hayashi, Kohei Kishi, Akihiro Yamamoto and, Yoshihiko Ito

Graphical Abstract


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69. You are entitled to access the full text of this document
Palladium-catalyzed asymmetric allylic alkylation using dimethyl malonate and its derivatives as nucleophile
Tetrahedron: Asymmetry, Volume 2, Issue 7, 1991, Pages 663-666
Motowo Yamaguchi, Toshihide Shima, Takamichi Yamagishi, Mitsuhiko Hida

Stereochemistry Abstract


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Dimethyl 2-acetamido-2-((E)-1,3-diphenyl-2-propenyl)malonate

C22H23NO5

E.e. = 94% (by 1H NMR)

[α]D20 =−51 (c = 0.6, EtOH)

Circular dichroism: λEtOHmaxvar epsilon) = 288 nm (−0.18)

Source of chirality: Asymm. synth. with palladium complex

Absolute configuration: S (assigned by chemical transformation from dimethyl 2-((E)-1,3R-diphenyl-2-propenyl)malonate)

image

Dimethyl 2-((E)-1,3-diphenyl-2-propenyl)malonate

C20H20O4

E.e. = 90% (by 1H NMR)

[α]D20 =+18 (c = 0.6, EtOH)

Circular dichroism: λEtOHmaxvar epsilon) = 292 nm (−0.10)

Source of chirality: Asymm. synth. with palladium complex

Absolute configuration: R (ref. Hayashi, T.: Yamamoto, A.; Hagihara, T.; Ito, Y. Tetrahedron Lett. 1986, 27, 191.)

image

Dimethyl 2-methyl-2-((E)-1,3-diphenyl-2-propenyl)malonate

C21H22O4

E.e. = 80% (by 1H NMR)

[α]D20= −37 (c = 0.6, EtOH)

Circular dichroism: λEtOHmaxvar epsilon) = 295 nm (−0.15)

Source of chirality: Asymm. synth. with palladium complex

Absolute configuration: R

image

Dimethyl 2-trifluoroacetamido-2-((E)-1,3-diphenyl-2-propenyl)malonate

C22H20NO5F3

E.e. = 78% (by 1H NMR)

[α]D20 =−41 (c = 0.6, EtOH)

Circular dichroism: λEtOHmaxvar epsilon) = 286nm (−0.43)

Source of chirality: Asymm. synth. with palladium complex

Absolute configuration: S

image

Dimethyl 2-methoxycarbonyl-2-((E)-1,3-diphenyl-2-propenyl)malonate

C22H22O6

E.e. = 81% (by 1H NMR)

[α]D20 = −23 (c = 0.6, EtOH)

Circular dichroism: λEtOHmaxvar epsilon) = 290 nm (−0.36)

Source of chirality: Asymm. synth. with palladium complex

Absolute configuration: S

image

3-((E)-1,3-diphenyl-2-propenyl)-2,4-pentanedione

C20H20O2

E.e. = 90% (by 1H NMR)

[α]D20 = −10(c = 0.6, EtOH)

Source of chirality: Asymm. synth. with palladium complex

Absolute configuration: R (ref. Hayashi, T.; Yamamoto, A.; Hagihara, T.; Ito, Y. Tetrahedron Lett. 1986, 27, 191.)

70. You are entitled to access the full text of this document
Remote substituent effect in palladium/pyridinyl-oxazolines catalyzed asymmetric allylic alkylation
Journal of Molecular Catalysis A: Chemical, Volume 193, Issues 1-2, 17 February 2003, Pages 89-95
Zhi-Peng Li, Fang-Yi Tang, Hua-Dong Xu, Xin-Yan Wu, Qi-Lin Zhou, Albert S. C. Chan
71. You are entitled to access the full text of this document
New enantiopure cyclic β-iminophosphine ligands: applications in Pd-catalyzed asymmetric allylic substitution
Tetrahedron Letters, Volume 44, Issue 11, 10 March 2003, Pages 2413-2415
Maria Zablocka, Marek Koprowski, Bruno Donnadieu, Jean-Pierre Majoral, Mathieu Achard, Gérard Buono
New enantiopure cyclic β-iminophosphines are prepared and the catalytic properties of the corresponding Pd(0) complexes in asymmetric allylic alkylation and amination are reported.
image

72. You are entitled to access the full text of this document
Easily accessible ferrocenyl N-P/S type ligands and their applications in asymmetric allylic substitutions
Tetrahedron: Asymmetry, Volume 17, Issue 4, 20 February 2006, Pages 497-499
Fuk Loi Lam, Terry T.L. Au-Yeung, Hong Yee Cheung, Stanton H.L. Kok, Wing Sze Lam, Kwok Yin Wong, Albert S.C. Chan

Graphical abstract


image

73. You are entitled to access the full text of this document
Synthesis of novel chiral phosphine-triazine ligand derived from α-phenylethylamine for Pd-catalyzed asymmetric allylic alkylation
Chinese Chemical Letters, Volume 19, Issue 3, March 2008, Pages 261-263
Jia Di Huang, Xiang Ping Hu, Zhuo Zheng
74. You are entitled to access the full text of this document
Catalytic asymmetric synthesis of ethyl (1R,2S)-dehydrocoronamate
Tetrahedron Letters, Volume 48, Issue 6, 5 February 2007, Pages 945-948
Martin E. Fox, Ian C. Lennon, Vittorio Farina

Graphical abstract

The asymmetric synthesis of (1R,2S)-dehydrocoronamic acid ethyl ester using palladium-catalysed nucleophilic ring-opening of 3,4-epoxy-1-butene with a glycine anion equivalent as the key enantiodifferentiating step is described.
image

75. You are entitled to access the full text of this document
New chiral chelating phosphine complexes containing tricarbonyl(η6-arene) chromium for highly enantioselective allylic alkylation
Journal of Organometallic Chemistry, Volume 503, Issue 1, 1 November 1995, Pages 143-148
Yoshinori Hayashi, Hiroshi Sakai, Naotake Kaneta, Motokazu Uemura
76. You are entitled to access the full text of this document
Furanoside thioether–phosphinite ligands for Pd-catalyzed asymmetric allylic substitution reactions: Scope and limitations
Journal of Organometallic Chemistry, Volume 691, Issue 10, 1 May 2006, Pages 2257-2262
Montserrat Diéguez, Oscar Pàmies, Carmen Claver

Graphical abstract

A series of readily available thioether–phosphinite ligands with different electronic and steric properties has been tested in the Pd-catalyzed allylic substitution reactions of several acyclic and cyclic allylic substrates.
image

77. You are entitled to access the full text of this document
Synthesis of P-chirogenic diarylphosphinoacetic acids and their proline derivatives for palladium-catalysed allylic alkylation reactions
Tetrahedron Letters, Volume 46, Issue 47, 21 November 2005, Pages 8145-8148
Hubert Lam, Peter N. Horton, Michael B. Hursthouse, David J. Aldous, King Kuok (Mimi) Hii

Graphical abstract

The synthesis of P-chirogenic diarylphosphinocarboxylic acids was achieved, from which a new class of amido- and amino-diphosphine ligands (PNP*) were derived, containing an l-proline backbone. The catalytic activities of the novel ligands were evaluated in the palladium-catalysed allylic alkylation reaction of 1,3-diphenylpropenyl acetate.
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78. You are entitled to access the full text of this document
The mechanism of enantioselective palladium(0)-catalyzed allylic alkylation with chiral oxazolinylpyridines: a DFT study
Journal of Molecular Structure: THEOCHEM, Volume 716, Issues 1-3, 7 March 2005, Pages 79-87
Dianyong Tang, Xiaoling Luo, Wei Shen, Ming Li
79. You are entitled to access the full text of this document
A new class of C2-symmetric diphosphine ligands derived from valine: remarkably diverse behavior in catalytic asymmetric transformations
Tetrahedron: Asymmetry, Volume 10, Issue 23, 3 December 1999, Pages 4501-4511
Akihito Saitoh, Takashi Uda, Toshiaki Morimoto
80. You are entitled to access the full text of this document
A convenient synthesis of optically active 1H-aziridine-2-carboxylic acids (esters)
Tetrahedron Letters, Volume 30, Issue 36, 1989, Pages 4881-4884
J. Legters, L. Thijs, B. Zwanenburg

Graphical Abstract

Aziridine-2-carboxylic esters of high optical purity were prepared from the corresponding glycidic esters.
image

81. You are entitled to access the full text of this document
Organogermanium compounds : XI. The stereochemistry of the reactions of optically active ethyl(1-naphthyl)phenylgermyllithium with some carbonyl compounds
Journal of Organometallic Chemistry, Volume 37, Issue 2, 16 April 1972, Pages 267-274
C. Eaborn, R. E. E. Hill, P. Simpson
82. You are entitled to access the full text of this document
A regiochemical control in the π-allylpalladium substitution. Preparation of optically active γ-silylallylamines
Tetrahedron Letters, Volume 34, Issue 37, 10 September 1993, Pages 5919-5922
Hiroshi Inami, Takayori Ito, Hirokazu Urabe, Fumie Sato

Graphical Abstract

Optically active γ-trimethysilylallylamine derivatives 2 were prepared from γ-trimethylsilylallyl carbonates 1. Conversion of 2 to several γ-functionalized allylamine derivatives 3 was also demonstrated.
image

83. You are entitled to access the full text of this document
Synthetic approach to the total synthesis of fumitremorgins II synthesis of optically active pentacyclic intermediates and their dehydrogenation
Tetrahedron Letters, Volume 27, Issue 28, 1986, Pages 3235-3238
Masako Nakagawa, Hiroshi Fukushima, Tomohiko Kawate, Mitsuya Hongu, Shin-ichi Kodato, Teruaki Une, Mikio Taniguchi, Tohru Hino

Graphical Abstract

Optically active pentacyclic compound
image
and the related compounds are synthesized from 6-methoxy-L-tryptophan.
image

84. You are entitled to access the full text of this document
The synthesis of optically active 2-phenylthio aldehydes
Tetrahedron Letters, Volume 35, Issue 23, 6 June 1994, Pages 3991-3994
Kelly Chibale, Stuart Warren

Graphical Abstract

Optically active 2-PhS-aldehydes can be made in> 98% e.e. with R = Et, Pr, i-Pr, t-Bu, providing enolisation is avoided.
image

85. You are entitled to access the full text of this document
Enantio-dependent binding and transactivation of optically active phenylpropanoic acid derivatives at human peroxisome proliferator-activated receptor alpha
Bioorganic & Medicinal Chemistry Letters, Volume 12, Issue 3, 11 February 2002, Pages 333-335
Hiroyuki Miyachi, Masahiro Nomura, Takahiro Tanase, Masahiro Suzuki, Koji Murakami, Katsuya Awano

Graphical Abstract

Optically active phenylpropanoic acid derivatives [(S)-5, and (R)-5] were prepared and their affinities for peroxisome proliferator-activated receptor (PPAR)α and PPARγ were evaluated.
image

86. You are entitled to access the full text of this document
A new chiral host compound 10,10′-dihyrroxy-9,9′-biphenanthryl. Optical resolution of propionic acid derivatives, butyric acid derivatives, and 4-hydroxycyclopent-2-en-1-one derivatives by complexation
Tetrahedron Letters, Volume 29, Issue 15, 1988, Pages 1807-1810
Fumio Toda, Koichi Tanaka

Graphical Abstract

Optically active
image
was found to be very useful for resolution of propionic and butyric acid derivatives, and
image

image

87. You are entitled to access the full text of this document
Synthesis of new optically active cyanocyclopropanes as chiral dopants for ferroelectric liquid crystals
Tetrahedron Letters, Volume 32, Issue 7, 11 February 1991, Pages 939-942
Tetsuo Kusumoto, Akiko Nakayama, Ken-ichi Sato, Tamejiro Hiyama, Sadao Takehara, Tadao Shoji, Masashi Osawa, Takeshi Kuriyama, Kayoko Nakamura, Toru Fujisawa

Graphical Abstract

Optically active 2-alkyl-1-aryl-1-cyanocyclopropanes were synthesized from 2-aryl-4-hydroxyalkanenitriles which in turn were obtained by the reaction of chiral 1,2-epoxyalkanes with the carbanions derived from arylacetonitriles.
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88. You are entitled to access the full text of this document
Chirality recognition of 1,1′-bi-2-naphthol with optically active bis(oxazolinyl)pyridines
Tetrahedron: Asymmetry, Volume 4, Issue 7, July 1993, Pages 1461-1464
Hisao Nishiyama, Tomonori Tajima, Masahiro Takayama, Kenji Itoh

Graphical Abstract

Optically active 2,6-bis[(S)-4′-benzyloxazolin-2′-yl)pyridine, pybox-(S,S)-bz (1), proved to make a well-matched base-acid pair with the (S)-enantiomer of 1,1′-bi-2-naphthol [(S)-BN]on the basis of NMR study.
image


Stereochemistry Abstract


image

Pybox-(S,S)-bz

C25H23N3O2

2,6-Bis[(S)-4′-benzyloxazolin-2′-yl]pyridine

E.e. = 100 %

[α]D22 =−71.7 (c 1.02, CH2Cl2)

Source of chirality: natural

Absolute configuration: 4′S,4″S

(derived from L-phenylalanine)

89. You are entitled to access the full text of this document
2,2′-Bis(diarylstibano)-1,1′-binaphthyls (BINASbs); a useful chiral ligand for palladium-catalyzed asymmetric allylic alkylation, and the structure of a BINASb---PdCl2 complex
Tetrahedron Letters, Volume 44, Issue 33, 11 August 2003, Pages 6217-6220
Shuji Yasuike, Satoru Okajima, Kentaro Yamaguchi, Jyoji Kurita
Graphic
image

90. You are entitled to access the full text of this document
Palladium-catalyzed asymmetric allylations of chiral enamines bearing phosphine functionality. Effects of anionic counterparts of allylating reagents on asymmetric induction
Tetrahedron Letters, Volume 31, Issue 25, 1990, Pages 3623-3626
Kunio Hiroi, Jun Abe

Graphical Abstract


image

91. You are entitled to access the full text of this document
Palladium-catalyzed asymmetric alkylation of 2-azaallyl acetates for the synthesis of β-carboxyaspartic acid derivatives
Journal of Molecular Catalysis A: Chemical, Volume 140, Issue 3, 23 April 1999, Pages 255-258
Motowo Yamaguchi, Kazue Ohba, Hiroyuki Tomonaga, Takamichi Yamagishi
92. You are entitled to access the full text of this document
Preparation and application of polymer-supported π-allylpalladium complex as a chiral catalyst in the asymmetric allylic alkylation
Journal of Molecular Catalysis A: Chemical, Volume 174, Issues 1-2, 1 October 2001, Pages 151-157
H. -J. Park, Jin Wook Han, Hwimin Seo, Hye-Young Jang, Young Keun Chung, Junghun Suh
93. You are entitled to access the full text of this document
Influence on the enantioselectivity in allylic alkylation of the anomeric position of the phosphine-amide ligands derived from d-glucosamine
Tetrahedron, Volume 63, Issue 30, 23 July 2007, Pages 7133-7141
Katarzyna Glegoła, Eric Framery, Catherine Goux-Henry, K. Michał Pietrusiewicz, Denis Sinou

Graphical abstract


image

94. You are entitled to access the full text of this document
Palladium-catalyzed asymmetric allylic alkylation using iminophosphine ligands derived from chiral primary 1-ferrocenylalkylamines
Tetrahedron: Asymmetry, Volume 12, Issue 20, 13 November 2001, Pages 2793-2799
Tsutomu Fukuda, Akihiro Takehara, Masatomo Iwao

Graphical Abstract


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Stereochemistry Abstracts


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(S)-N-[2-(Diphenylphosphino)benzylidene]-1-ferrocenylethylamine

C31H28FeNP

[α]D26=+106 (c 1.01, CHCl3)

Source of chirality: (S)-1-ferrocenylethylamine

Absolute configuration: S

image

(S)-N-[2-(Diphenylphosphino)benzylidene]-1-ferrocenylpentylamine

C34H34FeNP

[α]D26=+92.6 (c 1.04, CHCl3)

Source of chirality: (S)-1-ferrocenylpentylamine

Absolute configuration: S

image

(S)-N-[2-(Diphenylphosphino)benzylidene]-1-ferrocenyl-2,2-dimethylpropylamine

C34H34FeNP

[α]D26=+72.2 (c 1.03, CHCl3)

Source of chirality: (S)-1-ferrocenyl-2,2-dimethylpropylamine

Absolute configuration: S

image

(S)-N-[2-(Diphenylphosphino)benzylidene]-α-ferrocenylbenzylamine

C36H30FeNP

[α]D27=+107 (c 1.04, CHCl3)

Source of chirality: (S)-α-ferrocenylbenzylamine

Absolute configuration: S

95. You are entitled to access the full text of this document
SYNTHESES OF OPTICALLY ACTIVE (+)- AND (−)-UNTENONE A
Tetrahedron, Volume 51, Issue 32, 7 August 1995, Pages 8749-8756
Hiroaki Miyaoka, Tatsuhiko Watanuki, Yasuhiro Saka, Yasuji Yamada
96. You are entitled to access the full text of this document
The synthesis of novel C2-symmetric P,N-chelation ruthenocene ligands and their application in palladium-catalyzed asymmetric allylic substitution
Tetrahedron Letters, Volume 48, Issue 4, 22 January 2007, Pages 585-588
Delong Liu, Fang Xie, Wanbin Zhang

Graphical abstract

Novel air-stable C2-symmetric tetrasubstituted ruthenocene-based ligands were readily synthesized and used for palladium-catalyzed asymmetric allylic substitution showing excellent enantioselectivity and high catalytic activity.
image

97. You are entitled to access the full text of this document
The preparation of optically active 3-fluoro-β-lactam derivatives
Journal of Fluorine Chemistry, Volume 54, Issues 1-3, September-October 1991, Page 193
J. T. Welch, R. Kawecki, J. A. Wichtowski, K. Araki
98. You are entitled to access the full text of this document
Microbiological synthesis and circular dichroism of optically active 2-deuterio-cycloalkanones
Tetrahedron Letters, Volume 21, Issue 44, 1980, Pages 4275-4278
G. Dauphin, J. C. Cramain, A. Kergomard, M. F. Renard, H. Veschambre
99. You are entitled to access the full text of this document
Convergent synthesis of optically active bifunctionalized [7]thiaheterohelicene
Tetrahedron Letters, Volume 36, Issue 6, 6 February 1995, Pages 915-918
Kazuhiko Tanaka, Hideji Osuga, Yuka Shogase, Hitomi Suzuki

Graphical Abstract

Optically active (P)- and (M)-2,13-bis(hydroxymethyl)dithieno[3,2-e:3′,2′-e′]benzo[1,2-b:4,3-b′]bis[1]benzothiophenes ([7]thiaheterohelicenes) were synthesized using bicyclic amino alcohol derived from
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-camphor.
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Optically active tricarbonyl(cyclohexadienyl)iron(1+) salts: Synthetic equivalents to spatially directed organic cations
Tetrahedron Letters, Volume 22, Issue 8, 1981, Pages 779-782
Arthur J. Birch, G. Richard Stephenson
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