N-heterocyclic carbene catalyzed cyanation reaction of carbonyl compounds with ethyl cyanoformate and acetyl cyanide
作者:Jie Zhang、GuangFen Du、YueKe Xu、Lin He、Bin Dai
DOI:10.1016/j.tetlet.2011.10.119
日期:2011.12
employed as an efficient catalyst for cyanation reaction of carbonyl compounds. Under catalysis of 1 mol % NHCs, various aldehydes and 2,2,2-trifluoroacetophenone coupled with ethyl cyanoformate in THF to provide cyanohydrins ethyl carbonates in excellent yields. While in the presence of 10 mol % catalyst, different types of aldehydes and 2,2,2-trifluoroacetophenone reacted with acetyl cyanide in dichloroethane
N-杂环卡宾(NHC)已被用作羰基化合物氰化反应的有效催化剂。在1 mol%NHCs催化下,各种醛和2,2,2-三氟苯乙酮与氰基甲酸乙酯在THF中偶联,以优异的产率提供氰醇碳酸乙酯。在存在10mol%催化剂的情况下,不同类型的醛和2,2,2-三氟苯乙酮与乙酰氯在二氯乙烷中反应,以中等至高收率得到酰化的氰醇。