Highly selective oxidizing process for preparing pyridin-carboxylic acids
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United States of America Patent
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Aug 12, 1980
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N/A
app pub date -
Jul 14, 1978
filing date -
Jul 18, 1977
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Expired
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Abstract
A highly selective oxidation process for preparing pyridin-carboxylic acids from pyridine compounds nucleus substituted with alkyl groups, through a carbon-carbon bond, and oxidizable to carboxyl, and from hydrosoluble hexavalent chromium compounds, in the presence of an acid. Particularly described is the oxidation of beta-picoline with sodium bichromate to obtain the sodium salt of nicotinic acid and 99.5% pure free acid, respectively.
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