Heterocyclic Ring-Closure Reactions. 6. Preparation and Further Cyclization Reactions of 5-Imino-1,3-diphenyl-4-thioxo-2-imidazolidinone and 5-Imino-1,3-diphenyl-2,4-imidazolidinedithione

Article abstract of DOI:10.1021/jo01307a005

Phenyl isocyanate (1a) and phenyl isothiocyanate (1b) react with cyanothioformanilide (2b) to give the title compounds 3b and 3c.With additional 1a, 3b,c provide the 5-(N-phenylcarbamoyl) derivatives 4b,c.With hydrochloric acid, 3b,c afford the 4-oxo comp