Asymmetric 1,4-reductions of and 1,4-additions to enoates and related systems
申请人:——
公开号:US20030125563A1
公开(公告)日:2003-07-03
One aspect of the present invention relates to methods for the transition-metal-catalyzed asymmetric 1,4-addition of a nucleophile, e.g., hydride, to cyclic and acyclic enoates and enones. In certain embodiments of the methods of the present invention, the transition metal catalyst consists essentially of copper and an asymmetric bidentate bisphosphine ligand.
Enantioselective conjugate reduction of α,β-unsaturated carboxamides with semicorrin cobalt catalysts
作者:Peter von Matt、Andreas Pfaltz
DOI:10.1016/s0957-4166(00)86123-6
日期:1991.1
Chiral semicorrin cobalt complexes, prepared in situ from cobalt(II) chloride and the free ligands, are efficient, highly enantioselective catalysts for the conjugate reduction of alpha,beta-unsaturated carboxamides with sodium borohydride. Enantiomeric excesses of up to 99 %, essentially quantitative yields, and high substrate/catalyst ratios (1 000 - 10 000:1) are attractive attributes of this catalytic process.
US6465664B1
申请人:——
公开号:US6465664B1
公开(公告)日:2002-10-15
US6787655B2
申请人:——
公开号:US6787655B2
公开(公告)日:2004-09-07
[EN] ASYMMETRIC 1,4-REDUCTIONS OF AND 1,4-ADDITIONS TO ENOATES AND RELATED SYSTEMS<br/>[FR] REDUCTIONS ASYMETRIQUES 1,4 D'ENOATES ET ADDITIONS 1,4 ASYMETRIQUES A DES ENOATES ET SYSTEMES ASSOCIES
申请人:MASSACHUSETTS INST TECHNOLOGY
公开号:WO2001019761A2
公开(公告)日:2001-03-22
One aspect of the present invention relates to methods for the transition-metal-catalyzed asymmetric 1,4-addition of a nucleophile, e.g., hydride, to cyclic and acyclic enoates and enones. In certain embodiments of the methods of the present invention, the transition metal catalyst consists essentially of copper and an asymmetric bidentate biphosphine ligand.