scholarly journals New Directing Groups for Metal-Catalyzed Asymmetric Carbon–Carbon Bond-Forming Processes: Stereoconvergent Alkyl–Alkyl Suzuki Cross-Couplings of Unactivated Electrophiles

2012 ◽  
Vol 134 (13) ◽  
pp. 5794-5797 ◽  
Author(s):  
Ashraf Wilsily ◽  
Francesco Tramutola ◽  
Nathan A. Owston ◽  
Gregory C. Fu
Keyword(s):  
Carbon Bond ◽  
Bond Forming ◽  
Carbon Carbon Bond ◽  
Metal Catalyzed ◽  
Asymmetric Carbon

The Stereochemistry of Organometallic Compounds. XXIX. Synthesis of Steroidal 1,4-Diphosphine, 1,3-Diphosphine and 1,6-Diphosphine and Their Evaluation as Ligands in Metal Catalyzed Asymmetric Synthesis

1987 ◽  
Vol 40 (6) ◽  
pp. 1083 ◽  
Author(s):  
RJ Thomson ◽  
WR Jackson ◽  
D Haarburger ◽  
EI Klabunovsky ◽  
VA Pavlov
Keyword(s):  
Asymmetric Synthesis ◽  
Asymmetric Hydrogenation ◽  
Organometallic Compounds ◽  
Carbon Bond ◽  
Bond Forming ◽  
Carbon Carbon Bond ◽  
Bond Forming Reactions ◽  
Hydrogenation Reactions ◽  
Metal Catalyzed ◽  
Asymmetric Carbon

The steroidal 1,4-diphosphines 3α- and 3β-diphenylphosphino-2a-(2'-diphenylphosphinoethyl)-5α-cholestanes and their 5H-benzo[b] phosphindole derivatives have been prepared and shown to be useful ligands in asymmetric hydrogenation reactions. Interestingly the 3α- and 3β-derivatives lead to opposing enantioselection preferences when used in these reactions. A steroidal 1,3-diphosphine, 3α-diphenylphosphino-2α-diphenylphosphinomethyl-5α-cholestane, has been prepared as a mixture containing some of the 3β-epimer. The 3α-1,3-diphosphine led to similar enantioselection in hydrogenation reactions as the 3α-1,4-diphosphine, and a model is proposed to explain the sense of the enantioselectivity in the 1,4- and 1,3-diphosphines. A steroidal 1,6-diphosphine has also been prepared but leads to lower optical yields in the hydrogenation reactions. These ligands have been shown to lead to only poor to moderate optical yields when used in asymmetric carbon-carbon bond forming reactions.

scholarly journals Applications of 4,4′-(Me3Si)2-BINAP in Transition-Metal-Catalyzed Asymmetric Carbon—Carbon Bond-Forming Reactions.

ChemInform ◽  
2005 ◽  
Vol 36 (45) ◽  
Author(s):  
Masamichi Ogasawara ◽  
Helen L. Ngo ◽  
Takeshi Sakamoto ◽  
Tamotsu Takahashi ◽  
Wenbin Lin
Keyword(s):  
Transition Metal ◽  
Carbon Bond ◽  
Bond Forming ◽  
Carbon Carbon Bond ◽  
Bond Forming Reactions ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed ◽  
Asymmetric Carbon

Applications of 4,4‘-(Me3Si)2-BINAP in Transition-Metal-Catalyzed Asymmetric Carbon−Carbon Bond-Forming Reactions

2005 ◽  
Vol 7 (14) ◽  
pp. 2881-2884 ◽  
Author(s):  
Masamichi Ogasawara ◽  
Helen L. Ngo ◽  
Takeshi Sakamoto ◽  
Tamotsu Takahashi ◽  
Wenbin Lin
Keyword(s):  
Transition Metal ◽  
Carbon Bond ◽  
Bond Forming ◽  
Carbon Carbon Bond ◽  
Bond Forming Reactions ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed ◽  
Asymmetric Carbon

Hydrolase-catalyzed asymmetric carbon–carbon bond formation in organic synthesis

RSC Advances ◽  
2015 ◽  
Vol 5 (22) ◽  
pp. 16801-16814 ◽  
Author(s):  
Zhi Guan ◽  
Ling-Yu Li ◽  
Yan-Hong He
Keyword(s):  
Organic Synthesis ◽  
Bond Formation ◽  
Carbon Bond ◽  
Bond Forming ◽  
Carbon Carbon Bond ◽  
Bond Forming Reactions ◽  
Asymmetric Carbon

This article reviews the hydrolase-catalyzed asymmetric carbon–carbon bond-forming reactions for the preparation of enantiomerically enriched compounds in organic synthesis.

ChemInform Abstract: Catalytic Asymmetric Carbon-Carbon Bond Forming Reactions Catalyzed by Tetrahydroisoquinoline (TIQ) N,N′-Dioxide Ligands.

ChemInform ◽  
2013 ◽  
Vol 44 (32) ◽  
pp. no-no
Author(s):  
Zamani E. D. Cele ◽  
Sphelele C. Sosibo ◽  
Pher G. Andersson ◽  
Hendrik G. Kruger ◽  
Glenn E. M. Maguire ◽  
...  
Keyword(s):  
Carbon Bond ◽  
Bond Forming ◽  
Carbon Carbon Bond ◽  
Bond Forming Reactions ◽  
Catalytic Asymmetric ◽  
Asymmetric Carbon

ChemInform Abstract: Copper Ion-Catalyzed Asymmetric Carbon-Carbon Bond-Forming Reaction at the 2-Position of a Piperidine Skeleton.

ChemInform ◽  
2010 ◽  
Vol 33 (33) ◽  
pp. no-no
Author(s):  
Osamu Onomura ◽  
Yasuhisa Kanda ◽  
Yasuharu Nakamura ◽  
Toshihide Maki ◽  
Yoshihiro Matsumura
Keyword(s):  
Copper Ion ◽  
Carbon Bond ◽  
Bond Forming ◽  
Carbon Carbon Bond ◽  
Asymmetric Carbon
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