Process for producing N-(3', 4'-dimethoxycinnamoyl)-anthranilic acid
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United States of America Patent
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Jun 29, 1993
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N/A
app pub date -
Jun 7, 1991
filing date -
Nov 6, 1989
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Expired
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Abstract
A process for producing N-(3',4'-dimethoxycinnamoyl)-anthranilic acid, which comprises (i) allowing 3',4'-dimethoxycinnamic acid to react with anthranilic acid in an aprotic polar solvent in the presence of a particular inorganic salt and an iminium salt--which could be prepared quantitatively from dimethylformamide and an inexpensive acid halide--or (ii) allowing 3',4'-dimethoxycinnamic acid to react with an iminium salt and then with an anthranilic acid-inorganic salt complex, a novel complex not described in the literature. According to the process of this invention, the desired compound can be produced in a high yield with no substantial formation of hardly separable by-products.
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