<i>N</i>-Heterocyclic Carbene-Catalysed Direct Synthesis of Cyano Esters via Cyanation-Esterification Reaction of<i>α</i>-Keto Esters
作者:Jie Zhang、Ying Wang、Guangfen Du、Cheng-Zhi Gu、Bin Dai
DOI:10.1002/cjoc.201500399
日期:2015.10
The cyanation‐esterification reaction of α‐keto esters catalysed by N‐heterocyclic carbenes (NHCs) is developed. Under the catalysis of 10 mol% 1,3‐bis(2,6‐diisopropylphenyl)imidazol‐2‐ylidene, aromatic and aliphatic α‐keto esters reacted with ethyl cyanoformate or acetyl cyanide to produce the corresponding cyano esters with a tetrasubstituted carbon center in high yields.
开展了N-杂环卡宾(NHCs)催化的α-酮酯的氰化酯化反应。在10 mol%的1,3-双(2,6-二异丙基苯基)咪唑-2-亚烷基的催化下,芳族和脂族α-酮酯与氰基甲酸乙酯或乙酰氰反应生成相应的具有四取代碳中心的氰基酯高产。