Process for producing 2,3,5-trichloropyridine

Details Process for producing 2,3,5-trichloropyridine Process for producing 2,3,5-trichloropyridine

1979-09-10

1981-03-24

Rotman, Alan L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

260924, 260987, C07D21302

Patent

active

042581940

ABSTRACT:
A novel process for producing 2,3,5-trichloropyridine is described. In this process, 2,3,4,5-tetrachloropyridine is reacted, in an alkanephosphonic acid dialkyl ester (dialkyl alkane phosphonate) having 1 to 4 carbon atoms in each of the alkyl groups or in a phosphoric acid trialkyl ester (trialkyl phosphate) having 1 to 4 carbon atoms in each of the alkyl groups as the solvent, at 60.degree. to 120.degree. C., in the presence of 1.4 to 2.8 mols, per mol of 2,3,4,5-tetrachloropyridine, of an ammonium salt of an inorganic or organic acid, with 1.2 to 1.6 gram atoms of zinc per mol of 2,3,4,5-tetrachloropyridine, the 2,3,4,5-tetrachloropyridine being selectively dechlorinated in the 4-position.
2,3,5-Trichloropyridine is a valuable intermediate for producing herbicidally effective .alpha.-[4-(3',5'-dichloropyrid-2-yloxy)-phenoxy-]-alkanecarboxylic acids and derivatives thereof.
There are also described novel ammonium salts of methanephosphonic acid monomethyl ester, in the presence of which salts the selective dechlorination of 2,3,4,5-tetrachloropyridine in the 4-position is advantageously performed.

REFERENCES:
patent: 4111938 (1978-09-01), Redemann

Affiliated with

Also associated with

Rating

Process for producing 2,3,5-trichloropyridine 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 producing 2,3,5-trichloropyridine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing 2,3,5-trichloropyridine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2409174