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 ketene dithioacetals is described. Under very mild conditions, a number of pyrrolidinetriones 2 and piperidinetriones 3 have been synthesized by the cycloaddition reaction of α-carbamoyl ketene dithioacetals 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
描述了基于乙烯酮二硫缩醛的环化策略。在非常温和的条件下,通过 α-氨基甲酰基乙烯酮二硫代缩醛 1 与二羧酸二氯化物的环加成反应合成了许多吡咯烷三酮 2 和哌啶三酮 3,收率良好至极好。该协议的进一步应用通过从 2/3 和脒合成一组融合的嘧啶衍生物 4/5 得到强调。