Process for the production of polyhalogenated nicotinic acids

Details Process for the production of polyhalogenated nicotinic acids Process for the production of polyhalogenated nicotinic acids

1974-03-13

1976-05-11

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D21380

Patent

active

039563405

ABSTRACT:
A novel process for preparing 2,6-dichloro- and 2,5,6-trichloronicotinic acid is disclosed which comprises reacting 2,6-dichloro-3-chloromethylpyridine and 2,5,6-trichloro-3-chloromethylpyridine, respectively, with concentrated nitric acid in the presence of concentrated sulphuric acid and a metal salt catalyst. This process is both simple and economical; it is distinguished by high yields and low reaction temperatures while avoiding undesirable side-reactions.

REFERENCES:
patent: 2657207 (1953-10-01), Herring, Jr.
patent: 3278592 (1966-10-01), Moell et al.
Binns et al., Chemical Communications, (1969), pp. 1211-1212.

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