Triflimide: An Overlooked High-Performance Catalyst of the Mukaiyama Aldol Reaction of Silyl Ketene Acetals with Ketones
作者:Han Yong Bae、Benjamin List
DOI:10.1002/chem.201803142
日期:2018.9.18
The Mukaiyama aldol reaction is a widely applied carbon–carbon bond forming reaction. However, despite numerous well‐established methods using aldehydes as acceptors, only few examples exist with ketones. Here we report a highly practical catalytic approach to this transformation, namely, the triflimide catalyzed Mukaiyama aldol reaction of silyl ketene acetals with ketones. This method exhibits a
Mukaiyama羟醛反应是一种广泛应用的碳-碳键形成反应。但是,尽管有许多使用醛作为受体的公认方法,但酮的例子很少。在这里,我们报告了一种非常实用的催化方法来进行这种转化,即三氟甲酰亚胺催化的甲硅烷基乙烯酮缩醛与酮的Mukaiyama aldol反应。该方法具有广泛的底物范围,非常快,可耐受功能化底物,并且仅需百万分之几的催化剂负载量即可进行制备级反应,纯度高达数百克(纯度> 99%)。