Rates of formation of some phenazines by cyclization of di-and monoimines of N-(2-aminophenyl)-p-benzoquinone

NP Loveless, KC Brown…

Index: Loveless, Norman P.; Brown, Keith C.; Horrocks, Robert H. Journal of Organic Chemistry, 1981 , vol. 46, # 6 p. 1182 - 1185

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Citation Number: 12

Abstract

In aqueous solution the diimines exhibited three types of characteristics depending on solution pH. Around pH 1 the diimine absorptions disappeared, but no immediate products with a spectral absorption between 360 and 700 nm could be detected. Between pH 6 and 9 highly colored products were formed which proved to be the corresponding phenazines. Above pH 10 products formed which were also highly colored but were different from ...