Abstract
The direction of the reaction of coumarin derivatives with o-phenylenediamine depends on their structure, leading to 2-(2 ′-hydroxyphenyl)benzimidazole in the case of unsubstituted coumarin and to derivatives of benzimidazo[1,2-a]quinoline in the case of 7-amino-substituted coumarins.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1053–1055, August, 1992.
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Tkach, I.I., Luk'yanets, E.A. Some new reactions of coumarins. Chem Heterocycl Compd 28, 881–883 (1992). https://doi.org/10.1007/BF00531318
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DOI: https://doi.org/10.1007/BF00531318