Substituted-2,3-dicarboxypyridinium nitrates

Details Substituted-2,3-dicarboxypyridinium nitrates Substituted-2,3-dicarboxypyridinium nitrates

1992-10-28

1994-02-08

Ivy, C. Warren

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21330

Patent

active

052849554

ABSTRACT:
There are provided crystalline substituted-2,3-dicarboxypyridinium nitrate salts, the preparation thereof and the use thereof in the isolation and purification of important substituted pyridinedicarboxylic acid herbicide intermediates.

REFERENCES:
patent: 4798619 (1989-01-01), Los
Chemical Abstracts, vol. 112, No. 9, Abstract 76,991a, p. 783, Feb. 26, 1990.
P. Sutter and C. Weis, Journal of Heterocyclic Chemistry, 23 pp. 29-32 (1986).

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