Cyanative self-condensation of aromatic aldehydes promoted by VO(OiPr)3–Lewis base as a cooperative catalyst
作者:Koichi Kodama、Hiroaki Kawamata、Naoya Takahashi、Takuji Hirose
DOI:10.1039/c2ob26811f
日期:——
Self-condensation of aromatic aldehydes with trimethylsilyl cyanide proceeded by the cooperative catalytic effect of VO(OiPr)3 and a Lewis base to give the corresponding O-acylated cyanohydrins. The reaction conversion and selectivity were strongly dependent on the solvent used, the Lewis base, and the presence of oxygen. All the nine kinds of aromatic aldehydes considered herein afforded the O-acylated cyanohydrins with excellent selectivity under an O2 atmosphere.
芳香醛与三甲基硅基氰的自缩合反应在VO(OiPr)3和路易斯碱的协同催化作用下进行,生成相应的O-酰基化氰醇。反应的转化率和选择性强烈依赖于所使用的溶剂、路易斯碱以及氧气的存在。本文考虑的九种芳香醛在氧气氛围下均以优异的选择性生成了O-酰基化氰醇。