New reactivity of phosphirenes (phosphacyclopropenes). synthesis of allenylphosphines and of functional phosphirenes.
作者:F. Nief、F. Mathey
DOI:10.1016/s0040-4020(01)82319-x
日期:1991.8
1-Mesityl 2,3-dimethylphosphirene 1 and 1-mesityl 2-methylphosphirene 4 can be easily prepared from mesityldichlorophosphine (MesPCl2), AlCl3, 2-butyne or propyne and Bu3P. Because of the steric bulk of the mesityl substituent, n-butyllithium no longer reacts by nucleophilic addition onto the phosphorus atom of the phosphirene ring but instead, as a base, deprotonates the ring substituents. With 1
1-2,4,6-三甲苯基-2,3- dimethylphosphirene 1和1-均三甲苯基-2- methylphosphirene 4可以从mesityldichlorophosphine(MesPCl容易地制备2),的AlCl 3,2-丁炔或丙炔和卜3 P.由于空间位阻的异亚丙基丙酮取代基的的因此,正丁基锂不再通过亲核加成反应而反应成在磷腈环的磷原子上,而是作为碱使环取代基去质子化。使用1时,会在开环后生成烯丙基膦阴离子,并且该阴离子可以与各种亲电试剂反应,而使用4,该环结构是保守的,并且获得金属化的膦基。该阴离子可通过与多聚甲醛,酮或醛反应而官能化。获得了磷腈醇。