Abstract
New 3-(2-benzothiazolyl)chromones were obtained by the reaction of 2-(2,4-dihydroxy-5-ethylphenacyl)-benzothiazole with triethyl orthoformate or carboxylic acid anhydrides. Aminomethylation of the chromones and also of familiar 3-(2-benzimidazolyl)chromones by substituted 1,1-diaminomethanes gave Mannich bases.
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For Communication 21, see [1].
Taras Shevchenko Kiev University, Kiev, Ukraine. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1072–1078, August, 1998.
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Frasinyuk, M.S., Turov, A.V. & Khilya, V.P. Chemistry of the hetero analogs of isoflavones. 22. Mannich reaction in the benzimidazole and benzothiazole analogs of isoflavones. Chem Heterocycl Compd 34, 923–928 (1998). https://doi.org/10.1007/BF02311328
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DOI: https://doi.org/10.1007/BF02311328