N. N. Kolos, B. Insuasti, Kh. Kiroga
1986
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Journal
Chemistry of Heterocyclic Compounds
Abstract
The reaction between o-phenylenediamine and its 4-chloro- and 3,5-dichloro-derivatives and 4-substituted Ω-bromoacetophenones gives 1,2-dihydroquinoxalines. It has been found that the preferred course of the reaction under basic catalytic conditions involves the more basic of the amino groups of the diamine in condensation with the keto group. Anomalies have been found in the spectral-luminescent properties of the dihydroquinoxalines, owing to specific interactions with protic solvents.