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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
Ketcham, Roger,Schaumann, Ernst
, p. 3748 - 3750 (1980)
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
