Abstract
Reactions of thiohydrazides of oxamic acids with 17-chloro-16-formylandrosta-5,16-diene give the corresponding thiohydrazones at the formyl group. Their subsequent reactions with alkali (het)arenethiolates yield 17-het(aryl)thio derivatives, being accompanied by cyclization of the thiooxalylhydrazone fragment into a 1,3,4-thiadiazole ring.
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