Monothioacetalization of acetals catalyzed by dicyanoketene acetals
作者:Tsuyoshi Miura、Yukio Masaki
DOI:10.1016/0040-4020(95)00627-k
日期:1995.9
A type of capto-dative olefin, dicyanoketeneacetal such as dicyanoketene dimethyl acetal and ethylene acetal is introduced to be a noveltype of π-acidcatalyst for the monothioacetalization of acetals as well as the corresponding α,β-unsaturated systems. Particularly, the catalytic activity of dicyanoketene ethylene acetal was found to be superior to that of tetracyanoethylene and highly chemoselective