STEREOCHEMICAL EVIDENCE FOR ELIMINATION-ADDITION AND A METHYLENETHIOXOPHOSPHORANE (THIOPHOSPHENE) INTERMEDIATE IN NUCLEOPHILIC-SUBSTITUTIONAT THE P=S CENTER OF A BENZYLIC PHOSPHONAMIDOTHIOIC CHLORIDE
Mjp. Harger, STEREOCHEMICAL EVIDENCE FOR ELIMINATION-ADDITION AND A METHYLENETHIOXOPHOSPHORANE (THIOPHOSPHENE) INTERMEDIATE IN NUCLEOPHILIC-SUBSTITUTIONAT THE P=S CENTER OF A BENZYLIC PHOSPHONAMIDOTHIOIC CHLORIDE, Chemical communications, (21), 1998, pp. 2339-2340
The two diastereoisomers of ArCH2P(S)(NMeR)Cl (Ar = 4-NO2C6H4, R* = C
HMePh) react with Et2NH (0.2 mol dm(-3)) in CH2Cl2 to give mixtures of
the diastereoisomers of ArCH2P(S)(NMeR)NEt2 in practically the same
ratio (54.5:45.5 or 53:47); such non-stereospecificity points to a thi
ophosphene intermediate ArCH=P(S)NMeR as the product-forming species.