Catalytic Enantioselective Conjugate Addition of Grignard Reagents to Cyclic Enones Using<i>C</i><sub>1</sub>-1,1′-Bisisoquinoline-Based Chiral Ligands
作者:Gao Qi、Zaher M. A. Judeh
DOI:10.1080/00397911.2010.541969
日期:2012.6
Abstract New highly constrained chiral C 1-1,1′-bisisoquinoline ligands were examined in the enantioselectiveconjugateaddition of Grignard reagents to cyclohexenone and cyclopentenone. The desired 1,4-adducts were obtained in excellent yield and moderate enantiomeric excess (up to 35%). GRAPHICAL ABSTRACT
摘要 在格氏试剂与环己烯酮和环戊烯酮的对映选择性共轭加成中,研究了新的高度受限的手性 C 1-1,1'-双异喹啉配体。以极好的收率和适度的对映体过量(高达 35%)获得了所需的 1,4-加合物。图形概要
Organocatalytic Transfer Hydrogenation of Cyclic Enones
作者:Jamison B. Tuttle、Stéphane G. Ouellet、David W. C. MacMillan
DOI:10.1021/ja0653066
日期:2006.10.1
The firstenantioselectiveorganocatalytic transfer hydrogenation of cyclic enones has been accomplished. The use of iminium catalysis has provided a neworganocatalyticstrategy for the enantioselective reduction of beta,beta-substituted alpha,beta-unsaturated cycloalkenones, to generate beta-stereogenic cyclic ketones. The use of imidazolidinone 4 as the asymmetric catalyst has been found to mediate
Hydride reduction of alpha, beta-unsaturated carbonyl compounds using chiral organic catalysts
申请人:MacMillan David
公开号:US20060161024A1
公开(公告)日:2006-07-20
Nonmetallic, chiral organic catalysts are used to catalyze the 1,4-hydride reduction of an α,β-unsaturated carbonyl compound. The α,β-unsaturated carbonyl compound may be an aldehyde or cyclic ketone, and the hydride donor may be a dihydropyridine. The reaction is enantioselective, and proceeds with a variety of hydride donors, catalysts, and substrates. The invention also provides compositions effective in carrying out the 1,4-hydride addition of α,β-unsaturated carbonyl compounds.
Highly enantioselective cyclization using cationic Rh(I) with chiral ligand
作者:Xiao-Ming Wu、Kazuhisa Funakoshi、Kiyoshi Sakai
DOI:10.1016/s0040-4039(00)60966-8
日期:1992.10
(>99% de) of 3R (or S) 3,4-disubstituted 4-pentenals into the corresponding 3,4-cis(or trans)-disubstituted cyclopentanone and highly enantioselective cyclization (>99% ee) of 4-substituted 4-pentenals into 3-substituted cyclopentanone were achieved by using cationic Rh+(BINAP)ClO4−.