A new method is proposed for the preparation of N-(2-aminophenyl)isoindoles by the reaction of o-(bromomethyl)benzophenones with 1,2-phenylenediamines. The reaction of N-(2-aminophenyl)isoindoles with Ac2O leads to 1,N-diacetyl- or 1,N,N-triacetyl derivatives, whereas heating with formic acid or diethyl oxalate leads to cyclization with the formation of 11-arylisoindolo[2,1-a]quinoxaline derivatives. Salt formation in the 11-arylisoindolo[2,1-a]quin-oxaline series was studied.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 1113–1123, July, 2012.
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Sypchenko, V.V., Potikha, L.M., Kovtunenko, V.A. et al. Preparation of isoindolo[2,1-a]quinoxalines based on N-(2-aminophenyl)isoindole derivatives. Chem Heterocycl Comp 48, 1033–1042 (2012). https://doi.org/10.1007/s10593-012-1096-x
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DOI: https://doi.org/10.1007/s10593-012-1096-x