Restudy of the reaction of gallic acid and chloroacetic acid
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We report the reaction of gallic acid with chloroacetic acid and three equivalents of sodium hydroxide. In this reaction, 2,6-dihydroxy-4-carboxyphenoxyacetic acid (A) is produced instead of 2,3-dihydroxy-5-carboxyphenoxyacetic acid (B), previously informed(1)). The structure of (A) was established by C-13-NMR and also confirmed through XH CORR and COLOC bidimensional techniques, performed on the diisobutylester.