13H-Quinazolino[3,4-a]quinazolin-13-one: synthesis and structural revision

13H-Quinazolino[3,4-a]quinazolin-13-one has been synthesized from 2-aminobenzamide via 11b,12-dihydro-13H-quinazolino[3,4-a]quinazolin-13-one in four steps. However, the spectroscopic data did not match with those of literature data. Thus, the published structure from the reaction of 2-aminobenzonitrile and triethyl orthoformate is not 13H-quinazolino[3,4-a]quinazolin-13-one and has been revised as 8H-quinazolino[4,3-b]quinazolin-8-one.