Asymmetric Reduction of<i>tert</i>-Butanesulfinyl Ketimines by N-Heterocyclic Carbene Boranes
作者:Tao Liu、Ling-yan Chen、Zhihua Sun
DOI:10.1021/acs.joc.5b02084
日期:2015.11.20
N-heterocyclic carbene borane (NHC-borane) based on a triazole core is demonstrated for the first time to be efficient for reduction of a variety of tert-butanesulfinyl ketimines. Up to 95% yield and up to >99% diastereomeric excess were achieved. NHC-borane exhibited excellent activities that are more efficient than or comparable to commonly used reductive reagents such as NaBH4, NaBH3CN, l-selectride
首次证明了基于三唑核的N-杂环卡宾硼烷(NHC-硼烷)可有效还原多种叔丁烷亚磺酰基酮亚胺。获得了高达95%的产率和高达> 99%的非对映异构体过量。NHC-硼烷表现出优异的活性,与常用的还原剂(如NaBH 4,NaBH 3 CN,1- selectride,Ru催化剂或BH 3 -THF)相比,具有更高的效率或与之相当。