Reactions of Alkyl Diphenylphosphinates and Related Thio Esters with Some Nucleophiles.<i>S</i><sub>N</sub>2 (S) Reaction and Wittig Type Rearrangement
irrespective of X, while, when X=Y=S, the reaction occurred exclusively at the ester sulfur atom, SN2(S), to give R3SCHR1R2 and [Ph2PS]−. When the X=O and Y=S, a Wittig type rearrangement of a carbanion [Ph2P(=O)SCR1R2]− was observed along with attacks on the phosphorus (major) and the sulfur (minor) atoms. Reactions with some other nucleophiles (hydride, amide and alkoxide ions) are also described.
series of phosphorus(V)–chalcogen interelement compounds via a radical process. The relative reactivities of the organic dichalcogenides (i.e., (PhS)2, (PhSe)2, and (PhTe)2) toward the PIII or PV groups in the diphosphine analogues under light were investigated in detail, and a convenient method was developed to form P–S or P–Se interelement compounds from tetraphenyldiphosphine disulfide and (PhS)2