Process for preparing pyridine-2,3-dicarboxylic acid compounds

Details Process for preparing pyridine-2,3-dicarboxylic acid compounds Process for preparing pyridine-2,3-dicarboxylic acid compounds

1989-02-10

1990-11-27

Rotman, Alan L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546319, C07D21308, C07D21314, C07D21380

Patent

active

049736957

ABSTRACT:
A process for preparing pyridine-2,3-dicarboxylic acid compounds of the following formula: ##STR1## wherein R.sup.1 and R.sup.3 are, identical or different, each a hydrogen atom or a lower alkyl group, R.sup.2 is a hydrogen atom, a lower alkyl group, or a phenyl-(lower)alkyl group which may have halogen atom or lower alkyl group on its phenyl ring, and R.sup.4 and R.sup.5 are, identical or different, each a lower alkoxy group.
The compounds are useful as an intermediate for preparing agricultural chemicals and pharmaceuticals.

REFERENCES:
patent: 4460776 (1984-07-01), Wepplo
patent: 4723011 (1988-02-01), Doehner
Frank et al., Journal of The American Chemical Society, vol. 71, No. 8, pp. 2629-2635, Aug. 1949.
Journal of Organic Chemistry Soc., vol. 21, p. 800, 1956.

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