Activated sterically strained C=N bond in <Emphasis Type="Italic">N</Emphasis>-substituted <Emphasis Type="Italic">p</Emphasis>-quinone mono- and diimines: XV. Synthesis,structure, and reactions with alcohols of <Emphasis Type="Italic">N</Emphasis>-carbamoyl-1,4-benzoquinone imines |
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| Authors: | S A Konovalova A P Avdeenko M V Polishchuk E N Lysenko V N Baumer I V Omel’chenko S A Goncharova |
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| Institution: | 1.Donbass State Engineering Academy,Kramatorsk,Ukraine;2.Institute for Single Crystals,National Academy of Sciences of Ukraine,Kharkiv,Ukraine;3.Sumy State University,Sumy,Ukraine |
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| Abstract: | The reaction of 4-aminophenols with N-nitrourea or with sodium cyanate in acetic acid gave the corresponding 4-ureidophenols which were oxidized to N-carbamoyl-1,4-benzoquinone imines, substituted N-(4-oxocyclohexa-2,5-dien-1-ylidene)ureas. N-(2,6-Dimethyl-4-oxocyclohexa-2,5-dien-1-ylidene)urea possessing activated sterically strained C=N bond reacted with alcohols to afford N-(1-alkoxy-2,6-dimethyl-4-oxocyclohexa-2,5-dienyl)ureas. |
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