Polycyclic N-hetero compounds. XIX. Synthesis of novel meso-ionic benz[h]imidazo[1,2-c]quinazoline and benzo[h]pyrrolo[1′,2′:3,4]imidazo[1,2-c]quinazoline derivatives

Benzh]imidazo1,2-c]quinazolinium-l-olate (5) and benzoh]pyrrolo1′,2′:3,4]imidazo1,2-c]quinazolinium-8-olate (9) having novel meso-ionic ring systems were synthesized by the reaction of N-(5,6-dihydrobenzoh]-quinazolin-4-yl)amino acids with acetic anhydride.