SOME RING CLOSURE REACTIONS WITH CYANOTHIOFORMAMIDES: NEW ROUTE FOR THE SYNTHESIS OF (IMIDAZOLIDINE, OXAZOLIDINE & PYRROLINE)-IMINOTHIONES, BENZOTHIAZOLOQUINAZOLINONES AND IMIDAZOQUINOXALINES
摘要:
Cyanothioformamides were reacted with isocyanates, isothiocyanates, aldehydes, acetylenedicarboxylic acid and anthranilic acids to produce imidazolidines, oxazolidines pyrroline, quinazolinones and benzothiazoloquinazolinones, respectively. Interaction of imidazolidineimino(thiones and dithiones) with o-phenylenediamines gave rise to imidazoquinoxalines and imidazaquinoxalinethiones, respectively.