Abstract
Treatment of quinonemonoimines and an N-phenylquinonediimine of the pyrido[1,2-a]benzimidazole series with 1,3-indanedione, barbituric acid, or malononitrile and also with thioglycolic acid gives mono substitution at the 8 position. On the other hand, reaction of the N-cyclohexylquinonediimine in this series with C-nucleophiles leads to monosubstitution at position 9.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 403–410, March, 2006.
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Slabko, O.Y., Verbitskii, G.A. & Kaminskii, V.A. Reactions of 7-oxo(7-imino)-1,2,7,10-tetrahydro-1,10a-cyclohexano-2-R1-3-R2-4-R3-pyrido[1,2-a]benzimidazoles with C-nucleophiles and thioglycolic acid. Chem Heterocycl Compd 42, 358–364 (2006). https://doi.org/10.1007/s10593-006-0093-3
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DOI: https://doi.org/10.1007/s10593-006-0093-3