Carbon–carbon bond forming reactions of acetylenic esters and ketones within frustrated phosphane/borane Lewis pair frameworks
作者:Long Wang、Jun Li、Dongsheng Deng、Constantin G. Daniliuc、Christian Mück-Lichtenfeld、Gerald Kehr、Gerhard Erker
DOI:10.1039/c9dt02624j
日期:——
The three-component reactions of bulky diarylbutenylphosphanes with dimethyl acetylenedicarboxylate (1a) and the strong boron Lewis acid B(C6F5)3give the ylide-substituted cyclopropane derivatives 26. The acetylenic ester 1a and ketone 1b react with oligomethylene bridged frustrated phosphane/borane Lewis pairs to give the bicyclic C–H insertion/C–C coupling reaction products. The formal carbene products
庞大的二芳基丁烯基膦与乙炔二羧酸二甲酯(1a)和强硼路易斯酸B(C 6 F 5)3的三组分反应,得到了叶立德取代的环丙烷衍生物26。炔基酯1a和酮1b与低聚亚甲基桥连的受阻膦/硼烷Lewis对反应,得到双环C–H插入/ CC偶联反应产物。形式卡宾产物是通过涉及极性中间体的逐步序列形成的。