Process for the preparation of 2,6-pyridinedicarboxylic acid est

Details Process for the preparation of 2,6-pyridinedicarboxylic acid est Process for the preparation of 2,6-pyridinedicarboxylic acid est

1998-03-12

2000-08-15

Fan, Jane

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21330

Patent

active

061039063

ABSTRACT:
A process for the preparation of 2,6-pyridinedicarboxylic acid esters of the general formula: ##STR1## wherein R.sup.1 is a C.sub.1 -C.sub.6 -alkyl group, a C.sub.3 -C.sub.6 -cycloalkyl group, an aryl group or an arylalkyl group, and R.sup.2 and R.sup.3 independently of one another are hydrogen or chlorine and R.sup.4 is hydrogen, a C.sub.1 -C.sub.6 -alkyl group, a C.sub.1 -C.sub.6 -alkoxy group or fluorine. The 2,6-pyridinedicarboxylic acid esters are obtained by reaction of the corresponding halopyridines with carbon monoxide and an alcohol of the general formula:

REFERENCES:
patent: 4995902 (1991-02-01), Brummer
patent: 5142057 (1992-08-01), Suto et al.
patent: 5925765 (1999-07-01), Bessard et al.
Kudo Catalyst, vol. 36, No. 8, pp. 580-584, Recent Topics in Complex Catalyst Reaction, pp. 1-16, 1994.
Jour. of Molecular Catalysis, 66, pp. 277-288, 1991.
Iovel, I., et al., Synth. Commun., vol. 22, No. 18, (1992), pp. 2691-2696.
Wang, G., et al., Synlett, No. 5, (1992), pp. 422 to 424.

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