Assembly of Dimethyl Acetylenedicarboxylate and Phosphanes with Aldehydes Leading to γ-Lactones Bearing α-Phosphorus Ylides as Wittig Reagents
作者:Jie-Cheng Deng、Fu-Wei Chan、Chih-Wei Kuo、Chun-An Cheng、Chien-Yu Huang、Shih-Ching Chuang
DOI:10.1002/ejoc.201200400
日期:2012.10
synthesis of aryl-substituted γ-lactones bearing an α-phosphorus ylide moiety through the assembly of dimethyl acetylenedicarboxylate (DMAD), electron-deficient aldehydes, and triaryl- or trialkylphosphanes in moderate to good yields. The formation of γ-lactones is highly dependent on the reaction time, the phosphane nucleophile, and the molar ratio of DMAD, aldehyde, and phosphane. We found that reactions
我们在本文中报告了通过组装乙炔二甲酸二甲酯 (DMAD)、缺电子醛和三芳基或三烷基膦以中等至良好的产率合成带有 α-磷叶立德部分的芳基取代 γ-内酯的便捷途径。γ-内酯的形成高度依赖于反应时间、磷烷亲核试剂以及 DMAD、醛和磷烷的摩尔比。我们发现 DMAD/醛/三对甲苯基膦摩尔比为 3:1:6 和更多缺电子醛(如 4-硝基苯甲醛和 4-氯-3-硝基苯甲醛)的反应产生良好的产率。分离的叶立德与作为 Wittig 试剂的醛反应,以中等产率得到烯烃。