Two stage process for preparing 2,6-pyridin-dicarboxylic acid

Details Two stage process for preparing 2,6-pyridin-dicarboxylic acid Two stage process for preparing 2,6-pyridin-dicarboxylic acid

1978-11-30

1980-12-02

Raymond, Richard

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21379

Patent

active

042373018

ABSTRACT:
This invention relates to a two stage process for preparing 2,6-pyridin-dicarboxylic acid or dipicolinic acid from 2,6-dimethyl-pyridine through oxidation of the latter in an acid environment with hexavalent chromium salts and formation of a molar addition compound between dicarboxylic acid, being formed by oxidation, and chromic anhydride in the first stage, and subsequent hot hydrolysis of the addition product so obtained, thus isolating 2,6-pyridin-dicarboxylic acid therefrom in the second stage. The invention also comprises the above mentioned intermediate complex addition compound and the 2,6-pyridin-dicarboxylic acid of high purity, obtained by the process according to said invention.

REFERENCES:
patent: 2415147 (1947-02-01), Ogilvie et al.
patent: 2578672 (1951-12-01), Corson et al.
patent: 3154549 (1964-10-01), Beck
patent: 3313821 (1967-04-01), Lekberg et al.
patent: 3334021 (1967-08-01), Hodson et al.
Epstein, Liebig's Ann. d. Chem., 231, (1895), pp. 24-36.
Ladenburg, Liebig's Ann. d. Chem., 247, (1888), pp. 32-41.
Black et al., Journ. Org. Chem., 14 (1949), p. 14.
Soine et al., Journal Ann. Pharm. Ass., 39, (1950), p. 421.
Henge, Ber., 67, B (1934), pp. 750-753.
Hodson et al., J. Bacteriol., 91(2), (1966), pp. 562-569.

Affiliated with

Also associated with

Rating

Two stage process for preparing 2,6-pyridin-dicarboxylic acid does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Two stage process for preparing 2,6-pyridin-dicarboxylic acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two stage process for preparing 2,6-pyridin-dicarboxylic acid will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2285240