作者:Stéphane G. Ouellet、Jamison B. Tuttle、David W. C. MacMillan
DOI:10.1021/ja043834g
日期:2005.1.1
The first enantioselectiveorganocatalytic hydride reduction has been accomplished. The use of iminium catalysis has provided a new organocatalytic strategy for the enantioselectivereduction of beta,beta-substituted alpha,beta-unsaturated aldehydes to generate beta-stereogenic aldehydes. The use of imidazolidinone 2 as the asymmetric catalyst has been found to mediate the transfer of hydrogen to a
第一次对映选择性有机催化氢化物还原已经完成。亚胺催化剂的使用为β,β-取代的α,β-不饱和醛的对映选择性还原生成β-立体醛提供了一种新的有机催化策略。已发现使用咪唑烷酮 2 作为不对称催化剂可介导氢从 Hantzsch 乙酯到一大类烯醛底物的转移。催化剂 2 在选择性 E-烯烃还原之前加速 EZ 异构化的能力允许在这个操作简单的协议中实施几何不纯的烯醛。
Hydride reduction of α,β-unsaturated carbonyl compounds using chiral organic catalysts
申请人:California Institute of Technology
公开号:US07323604B2
公开(公告)日:2008-01-29
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.