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Aminomethylene derivatives of azoles
Authors:I Ya Kvitko  L N Kurkovskaya  R V Khozeeva  A V El'tsov
Institution:(1) Lensovet Leningrad Technological Institute, 198013 Leningrad;(2) L. Ya. Karpov Scientific-Research Physicochemical Institute, 107120 Moscow
Abstract:4-Aminoethylidene and 4-aminomethylene derivatives of 5-imidazolone exist in the enamine form as two isomers that are stabilized by intramolecular hydrogen bonds of the NHctdotN and NHctdotO type. In solution the enamine with a five-membered H ring is gradually converted to the corresponding isomer with a six-membered H ring with an NHctdotO bond. Because of steric hindrance, rotation about the carbon-carbon double bond is realized more slowly in the aminoethylidene derivatives than in the aminomethylene derivatives of 5-imidazolone.See 1] for communication XXI.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1677–1679, December, 1978.
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