Process for the preparation of pyridine-2-3-dicarboxylic acid de

Details Process for the preparation of pyridine-2-3-dicarboxylic acid de Process for the preparation of pyridine-2-3-dicarboxylic acid de

1985-05-03

1988-05-31

Jiles, Henry R.

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

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

546113, 546116, 546193, 546194, 546281, 546291, 546296, 546297, 546299, 546306, 546316, 546321, 546250, C07D213803, C07D21382, C07D47104, C07D491048

Patent

active

047482443

ABSTRACT:
The invention relates to a process for the preparation of pyridine-2,3-dicarboxylic acid derivatives of formula ##STR1## which process comprises reacting a hydrazone of formula II ##STR2## with a maleic acid derivative of formula III ##STR3## to give a 1-amino-1,4-dihydropyridine-2,3-dicarboxylic acid derivative of formula IV ##STR4## and subsequently removing R.sub.9 R.sub.10 NH. In the above formulae, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.9, R.sub.10 and X are as defined in claim 1. The pyridine-2,3-dicarboxylic acid derivatives of formula I are intermediates for the preparation of herbicidal compounds.

REFERENCES:
patent: 3027380 (1962-03-01), Leonard et al.
patent: 4439607 (1984-03-01), Drabb
Cochran, J. L. et al, J. Org. Chem 26, pp. 808-811 (1961).
Oakes, V. et al, J. Chem. Soc. 1956, pp. 4433-4438.

Affiliated with

Also associated with

Rating

Process for the preparation of pyridine-2-3-dicarboxylic acid de does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of pyridine-2-3-dicarboxylic acid de, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of pyridine-2-3-dicarboxylic acid de will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1875234