Abstract
The corresponding 2,3-substituted 4(3H)-quinazolinones were obtained in the reactions of 2-methyl- and 2-phenyl-4-oxo-3,1-benzoxazines with 1-amino-1,2,4-triazole, 4-amino-2,3-dimethyl-1-phenyl-5-pyrazolone, 2-amino-5-ethyl-1,3,4-thiadiazole, 3-amino-6,6-dimethyl-4-oxo-4,5,6,7-tetrahydroindazole, 1-amino-3-cyano-4,6-dimethyl-2-pyridone, and 1-amino-3-cyano-6-phenyl-4-trifluoromethyl-2-pyridone. The formation of N-benzoylanthranilamides in the reactions of 2-phenyl-4-oxo-3,1-benzoxazine with 2 amino-5-ethyl-1,3,4-thiadiazole and 1-amino-3-cyano-6-phenyl-4-trifluoromethyl-2-pyridones was exceptional. The structures of two of the products have been confirmed by X-ray crystallography. Authors: N. N. Tonkikh, M. V. Petrova, A. F. Mishnev, K. V. Ryzhanova, F. M. Avotin'sh, and A. Ya. Strakov. English Translation in Chemistry of Heterocyclic Compounds , 2000, 36 (7), pp 822-829 http://link.springer.com/article/10.1007/BF02256917
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