L. Doszczak et J. Rachon, New, efficient and chemoselective method of thioacylation, starting from carboxylic acids, CHEM COMMUN, (21), 2000, pp. 2093-2094
S-Acylation of dithiophosphoric acids yields mixed anhydrides 3; they readi
ly isomerize to O-thioacyl 4 and S-thioacyl monothiophosphates 5, which tre
ated with the excess of dithiophosphoric acid 2 can be easily converted int
o thioacyl dithiophosphates 6, excellent thioacylating reagents.