Synthesis and reactions of [1-(trialkylsilyl)alkylidene]triphenylphosphoranes
Alkylidenetriphenylphosphoranes 1 react with trialkyl halosilanes 2 to afford silylated alkylidenephosphoranes 5, which can be converted to acylated alkylidenephosphoranes 8 and 10 by trimethylsilyl carboxylates 6 or carboxylic anhydrides 10. Bis(acylalkylidenephosphoranes) 13-15 are available from 5 and bis(trimethylsilyl) dicarboxylates 12 or cyclic or polymeric anhydrides 16, 17.
Bestmann,Bomhard,Dostalek,Pichl,Riemer,Zimmermann
p. 787 - 792
(2007/10/02)
Spontaneous dissociation of phosphoniumylidyl-chlorophosphines to ionic phosphenium chlorides
The products from the replacement of two chlorofunctions of PCl3 by a pair of phosphoniumylidyl substituents or by both a phosphoniumylidyl and an amino substituent are ionic phosphenium chlorides and not covalent chlorophosphines.