Cyano-borrowing reaction: nickel-catalyzed direct conversion of cyanohydrins and aldehydes/ketones to β-cyano ketone
作者:Zhao-Feng Li、Qian Li、Li-Qing Ren、Qing-Hua Li、Yun-Gui Peng、Tang-Lin Liu
DOI:10.1039/c9sc00640k
日期:——
nickel-catalyzed, high atom- and step-economical reaction of cyanohydrins with aldehydes or ketones via an unprecedented “cyano-borrowing reaction” has been developed. Cleavage of the C–CN bond of cyanohydrins followed by aldol condensation and conjugate addition of cyanide to α,β-unsaturated ketones proceeded to deliver a range of racemic β-cyano ketones with good to high yields. The practical procedure
通过前所未有的“借氰反应” ,氰醇与醛或酮的直接镍催化、高原子和多步经济的反应已被开发出来。氰醇的 C-CN 键断裂,然后是羟醛缩合和氰化物与 α,β-不饱和酮的共轭加成,以良好至高产率提供一系列外消旋 β-氰基酮。使用商业和毒性较低的 CN 源的实际程序预示着该协议的广泛应用。