phosphaalkenes with inverse electron density - react primarily at the three-membered ring with nucleophilic reagents. From their reactions with organolithium compounds 2a-c and Grignard reagents 5a,b the cyclopropenylphosphines 4a-f are obtained after addition of chlorotrimethylsilane; of these products only 4a, d, and e were isolated and characterized. Methanolysis of products 4a-f yields the primary (7a-d) and
磷富集烯1a,b-具有相反电子密度的
磷烯烃-主要在三元环上与亲核试剂反应。从它们与
有机锂化合物2a-c和
格氏试剂5a,b的反应中,在加入
氯代三甲基
硅烷后得到环
丙烯基膦4a-f。在这些产物中,只有4a,d和e被分离和鉴定。产物4a-f的
甲醇分解通过PSi键的裂解产生伯膦(9a -d)和仲膦(9a,b)。化合物1b与
乙胺10a,b反应通过裂解三元环得到1-
磷-1,3,5-己二酮11a(X射线结构)和11b。相同的
磷酰富马烯与
环丁二烯17a,b反应,最初得到2-
磷杂双
环己烯18a,b,在室温下于
氯仿中搅拌后,进行[2 + 2]环还原,得到开链异构体20a,b。