Catalytic Conjugate Addition of Acyl Anion Equivalents Promoted by Fluorodesilylation
作者:Scott E. Denmark、Lindsey R. Cullen
DOI:10.1021/ol403041k
日期:2014.1.3
The conjugate addition of acyl anion equivalents derived from 2-silyl-1,3-dithianes to α,β-unsaturated ketones and esters has been achieved using a substoichiometric amount of TBAF. High yields and short reaction times are observed for the addition of aryl-1,3-dithianes to a variety of cyclic and acyclic α,β-unsaturated carbonyl acceptors. Observation of the reactive anion by 13C NMR spectroscopy and
已经使用亚化学计量的TBAF实现了将2-甲硅烷基-1,3-二硫杂环丁烷衍生的酰基阴离子当量共轭添加到α,β-不饱和酮和酯中。对于将芳基-1,3-二硫杂环丁烷加成到各种环状和无环α,β-不饱和羰基受体上,观察到高产率和短反应时间。还显示了通过13 C NMR光谱观察反应性阴离子并扩展至不对称变体。