作者:Karl Scheidt、Brooks Maki、Audrey Chan
DOI:10.1055/s-2008-1072516
日期:2008.4
Homoenolate equivalents are generated by Lewis basic N-heterocyclic carbene catalysts and then protonated to generate efficiently saturated esters from unsaturated aldehydes. This reactivity is extended to the generation of beta-acylvinyl anions from alkynyl aldehydes. The asymmetric protonation of a homoenolate equivalent generated from a beta,beta-disubstituted aldehyde can be accomplished with a
Homoenolate 等价物由路易斯碱性 N-杂环卡宾催化剂生成,然后质子化以从不饱和醛有效生成饱和酯。这种反应性扩展到从炔醛生成 β-酰基乙烯基阴离子。由 β,β-二取代醛生成的同烯醇化物等价物的不对称质子化可以用手性 N-杂环卡宾完成。