<Emphasis Type="Italic">peri</Emphasis>-cyclization of 11-aroylmethyl-2,3,4,5-tetrahydro[1,3]-diazepinobenzimidazoles into 2-aryl-3,4,5,6-tetrahydro-2a,6a,10b-triazabenzo[<Emphasis Type="Italic">a</Emphasis>]cyclopenta[<Emphasis Type="Italic">cd</Emphasis>]azulenium bromides |
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| Authors: | T A Kuz’menko A S Morkovnik L N Divaeva M V Bogoslavtseva |
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| Institution: | 1.Institute of Physical and Organic Chemistry at the Southern Federal University,Rostov-on-Don,Russia |
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| Abstract: | 11-Aroylmethyl-2,3,4,5-tetrahydro1,3]diazepinobenzimidazoles at heating in conc. HBr suffer a peri-cyclization with the closure of an additional imidazole ring involving the carbonyl group of ketone and the nitrogen atom of the diazepine ring affording previously unknown 2-aryl-3,4,5,6-tetrahydro-2a,6a,10btriazabenzoa]cyclopentacd]azulenium bromides. |
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