abstract |
Organic dithiopyrophosphates of formula (I) are prepared by a two-step process from the corresponding 1,3-diol and thiophosphoryl chloride using 3-methylpyridine as both solvent and base. [Wherein, R 1, R 2, R 3, R 4 and R 5 are independently hydrogen, C 1 -4 alkyl, chloromethyl or bromomethyl being. |