Synthesis,spectral-luminescence,and acid-base properties of 3-halo-7-aminocoumarins |
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Authors: | N. A. Gordeeva M. A. KirpichËnok N. S. Patalakha I. I. Grandberg |
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Affiliation: | (1) K. A. Timiryazev Agricultural Academy, Moscow |
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Abstract: | The reactions of substituted coumarins with a variety of halogenating agents, leading to the formation of the corresponding 3-chloro-, 3-bromo-, and 3-iodo-7-aminocoumarins, have been studied. It has also been shown, based on the results of studies of the spectral-luminescence and acid-base characteristics of these 3-halo-7-aminocoumarins, that their basicity increases as the electron-donating nature of the substituent in the 4-position increases, and is also greater, as expected, for 3-iodo- and 3-chloro derivatives than for 3-bromo derivatives.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1600–1609, December, 1990. |
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