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A series of seventeen Mannich bases and some new sulphides have been prepared from 5-(p-)chlorophenyl-1,3,4-oxadiazol-2-thione. The site of the substituent in Mannich bases has been confirmed by stepwise synthesis, interconversion and spectral comparison with 2-alkylthio-5-(p-)chlorophenyl-1,3,4-oxadiazoles.

Synthesis of Mannich Bases and Sulphides Derived from 5-(p-)-Chlorophenyl 1, 3, 4-Oxadiazol-2-thione