The Chemistry of Trichlorosilyl Enolates. 2. Highly-Selective Asymmetric Aldol Additions of Ketone Enolates
作者:Scott E. Denmark、Ken-Tsung Wong、Robert A. Stavenger
DOI:10.1021/ja9636698
日期:1997.3.1
problem, namely, the invention/discovery of asuitable chiral Lewis acid catalyst to effect the reaction betweenan enoxysilane derivative and an aldehyde, Scheme 1 (X ) Me).In a recent Communication we have described a conceptuallydistinct approach which employs chiral Lewis bases (phos-phoramides) in combination with trichlorosilyl enolates, Scheme1(X)Cl).
尽管迄今为止取得了相当大的成功,但这些努力已经确定了该问题的相同解决方案,即发明/发现了合适的手性路易斯酸催化剂以实现烯氧基硅烷衍生物和醛之间的反应,方案 1 (X) Me)。在最近的一篇通讯中,我们描述了一种概念上不同的方法,该方法采用手性路易斯碱(磷酰胺)与三氯甲硅烷基烯醇化物,Scheme1(X)Cl)。