Abstract: The reaction of different mercapto substituted heterocycles with 0.0-dialkyl chlorphosphate or thiophosphates, gave the corresponding S- and N- alkylated derivatives instead of the expected phosphorylated products. ... In this paper we describe the unusual products formed with ... A typical experimental procedure involves the reaction of ... 2-mercapto benzothiazole6 (1. 0.005 mol) with o,o-dimethyl ... K2C03 (0.01 moll in dry acetone (50 ml) for 12 hrs at reflux