Reduction of 3-(carboxyaryl)isocoumarins with sodium borohydride proceeds with formation of corresponding 3-carboxyaryl-3,4-dihydroisocoumarins or isomeric dihydrophthalides, 3-(2-carb-oxybenzyl)-2-benzofuran-1(3H)-ones. Derivatives at the carboxyl group of 3-carboxyaryl-3,4-dihydro-isocoumarins and 3-(2-carboxybenzyl)-2-benzofuran-1(3H)-ones have been obtained.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1471-1484, October, 2011.
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Ishchenko, V.V., Voevoda, N.M., Shablykina, O.V. et al. Reduction of 3-(carboxyaryl)isocoumarins with sodium borohydride. Chem Heterocycl Comp 47, 1212–1224 (2012). https://doi.org/10.1007/s10593-012-0896-3
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DOI: https://doi.org/10.1007/s10593-012-0896-3