Procedure-Controlled Selective Synthesis of 5-Acyl-2-iminothiazolines and their Selenium and Tellurium Derivatives by Convergent Tandem Annulation
作者:Yang Wang、Wen-Xiong Zhang、Zitao Wang、Zhenfeng Xi
DOI:10.1002/anie.201101948
日期:2011.8.22
Concise and selective: The procedure‐controlled synthesis of the title compounds has been achieved for the first time by an organolithium‐promoted convergent tandem annulation involving readily available terminal alkynes, chalcogen elements (S, Se, and Te), carbodiimides, and acid chlorides. A novel 1,5‐acyl migration is considered to be essential for this useful transformation.
简便,选择性:通过有机锂促进的汇聚级联反应首次实现了标题化合物的程序控制合成,其中包括容易获得的末端炔烃,硫属元素(S,Se和Te),碳二亚胺和酰氯。对于这种有用的转化,新的1,5-酰基迁移被认为是必不可少的。