Synthesis and Characterization of a Stable Cyclic gem-Bis(phosphaylide): a 4π-Electron Three-Membered Heterocycle

The mixed P,S-bisylide 1 reacts with phosphenium salts, affording phosphoniophosphinocarbenes, with elimination of diphenyl sulfide. Using a more compact cyclic phosphenium cation, the reaction leads to the formation of an original three-membered heterocycle featuring a gem-bisylide function. This molecule represents the first isolable analogue of the phosphirenyl anion derivative.混合的P,S-双叶立德（P,S-bisylide）1与亚膦盐（phosphenium salts）发生反应，在消除二苯硫醚的同时生成鏻鎓膦基碳烯（phosphoniophosphinocarbenes）。采用更为紧凑的环状亚膦正离子时，该反应可生成一种带有偕双叶立德官能团的新颖三元杂环。该分子是磷烯基负离子（phosphirenyl anion）衍生物中首个可分离得到的类似物。