Abstract Picryl isothiocyanate (4), prepared in a two-step sequence from picryl chloride (2), reacts smoothly with alkyl azides to yield 4-alkyl-5-picrylimino-1, 2, 3, 4-thiatriazolines 5 which are stable below 100. These adducts combine with isocyanates in a bimolecular process with loss of nitrogen, similar to the formation of phenylimino derivatives but different from that of sulfonyliminothiatriazolines.
