Some ring closure reactions with cyanothioformamides: New route for the synthesis of (imidazolidine, oxazolidine & pyrroline)-iminothiones, benzothiazoloquina-zolinones and imidazoquinoxalines

Cyanothioformamides were reacted with isocyanates, isothiocyanates, aldehyd es, acetylenedicarboxylic acid and anthranilic acids to produce imidazolidi nes, oxazolidines pyrroline, quinazolinones and benzothiazoloquinazolinones , respectively. Interaction of imidazolidineimino(thiones and dithiones) wi th o-phenylenediamines gave rise to imidazoquinoxalines and imidazaquinoxal inethiones, respectively.