Abstract

Utility of (E)-4-(acetylamino)phenyl-4-oxo-2-butenoic acid with new sulfur reagents e.g. 2-amino-5-aryl-thiadiazoles 2 to afford the
corresponding adducts (3, 4, 5, 6). Reaction of the latter compounds with different electrophilic and nucleophilic reagents affords some
important heterocycle such as various furanones, thiadiazoles, pyridazinones, imidazolo[2,3-b]1,3,4-thiadiazoles, thiadiazolopyrimidines,
bezoxazinones, fused quinoxalinylquinazolinones

Key words: (E)-4-aryl-4-oxo-2-butenoic acid , furanones, thiadiazoles, pyridazinones, imidazolo[2,3-b]1,3,4-thiadiazoles, thiadiazolopyrimidines, bezoxazinones, fused quinoxalinylquinazolinones