Highly selective oxidizing process for preparing pyridin-carboxy

Details Highly selective oxidizing process for preparing pyridin-carboxy Highly selective oxidizing process for preparing pyridin-carboxy

1978-07-14

1980-08-12

Raymond, Richard

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546318, 546327, C07B 300, C07D21379, C07D21380

Patent

active

042174570

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.

REFERENCES:
patent: 2415147 (1947-02-01), Ogilvie et al.
patent: 3154549 (1964-10-01), Beck
patent: 3313821 (1967-04-01), Lekberg et al.

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