Addition Reaction of Imidazoles and Thiazoles with Silyl Enol Ethers in the Presence of Alkyl Chloroformate
作者:Takashi Itoh、Michiko Miyazaki、Kazuhiro Nagata、Akio Ohsawa
DOI:10.1016/s0040-4020(00)00331-8
日期:2000.6
with imidazole, thiazole, and their benzo derivatives in the presence of an alkyl chloroformate to give 2-substituted imidazolines and thiazolines in good yields via the intermediacy of unstable N-acylated quaternary salts of azoles. In addition, it was found that silyl enol ethers formed in situ were also useful for the reaction to afford the adducts only by simple sequential addition of five commercially
甲硅烷基烯醇醚和乙烯酮甲硅烷基缩醛与咪唑,噻唑及其苯并衍生物在氯甲酸烷基酯的存在下反应,通过不稳定的N-酰化季铵盐的中间体,以高收率得到2-取代的咪唑啉和噻唑啉。另外,发现仅通过简单地依次添加五种市售试剂,原位形成的甲硅烷基烯醇醚也可用于反应以提供加合物。