作者:Hui-Teng Er、David L. Pole、John Warkentin
DOI:10.1139/v96-165
日期:1996.8.1
prepared. The oxadiazolines undergo thermolysis at 60–80 °C in solution to afford the corresponding oxythiocarbene intermediates. In the absence of carbene traps, dimers of the carbenes were formed. The carbenes were trapped with ethyl crotonate, with dichloromaleic anhydride, with dimethyl acetylenedicarboxylate, and with phenyl isocyanate. Phenyl isocyanate traps methoxy(methylthio)carbene to form two
制备了四种在 C2 处带有烷硫基或芳硫基的 2-甲氧基-5,5-二甲基-Δ3-1,3,4-恶二唑啉。恶二唑啉在溶液中在 60-80°C 下发生热分解,得到相应的氧硫卡宾中间体。在没有卡宾陷阱的情况下,形成了卡宾的二聚体。卡宾用巴豆酸乙酯、二氯马来酸酐、乙炔二羧酸二甲酯和异氰酸苯酯捕获。异氰酸苯酯捕获甲氧基(甲硫基)卡宾以形成两种类型的加合物,这两种加合物都与二甲氧基卡宾与异氰酸苯酯反应得到的产物有根本的不同。所有加合物的结构都与卡宾的亲核行为一致。关键词:氧硫卡宾,恶二唑啉,热解,亲核。