Phase-Transfer-Catalyzed Asymmetric Conjugate Cyanation of Alkylidenemalonates with KCN in the Presence of a Brønsted Acid Additive
作者:Yan Liu、Seiji Shirakawa、Keiji Maruoka
DOI:10.1021/ol400143m
日期:2013.3.15
Highly enantioselective conjugate cyanation of alkylidenemalonates with KCN was achieved under mild phase-transfer conditions with a bifunctional phase-transfer catalyst. The effect of Brønstedacid additives was examined based on the hypothetical catalytic cycle, and the Brønstedacid additive was found to be essential to promote the conjugate cyanation efficiently.