Annulations of α-Carbamoyl Ketene Dithioacetals with Dicarboxylic Acid Dichlorides: Synthesis of Functionalized Pyrrolidinetriones and Piperidinetriones
作者:Ying Dong、Yaru Guo、Jun Liu、Gang Zheng、Mang Wang
DOI:10.1002/ejoc.201301227
日期:2014.2
annulation strategy based on ketenedithioacetals is described. Under very mild conditions, a number of pyrrolidinetriones 2 and piperidinetriones 3 have been synthesized by the cycloaddition reaction of α-carbamoyl ketenedithioacetals 1 with di-carboxylic acid dichlorides in good to excellent yields. Further application of this protocol is highlighted by the synthesis of a set of fused pyrimidine