Process for the production of 2,3,5,6-tetrachloropyridine and 2,

Details Process for the production of 2,3,5,6-tetrachloropyridine and 2, Process for the production of 2,3,5,6-tetrachloropyridine and 2,

1988-01-19

1988-11-15

Schwartz, Richard A.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21304

Patent

active

047851120

ABSTRACT:
Vapor phase chlorination of 2,6-dichloropyridine produces 2,3,6-trichloropyridine selectively over isomeric 2,4,6-trichloropyridine and of 2,3,6-trichloropyridine produces 2,3,5,6-tetrachloropyrindine in high selectivity over isomeric 2,3,4,6-tetrachloropyridine at temperatures of 300.degree. C. to 450.degree. C. The products are intermediates for insecticides and herbicides.

REFERENCES:
patent: 3251848 (1966-05-01), Taplin
patent: 3370062 (1968-02-01), Corran
patent: 3420833 (1969-01-01), Taplin
patent: 3538100 (1970-11-01), Smith
patent: 4281135 (1987-07-01), Perettie et al.
H. Suschitsky (Editor), Polychloroaromatic Compounds, Plenum Press, London, 1974, pp. 225-227 and 439-440.
Derwent Abstract of EP 239,964, 10/7/87.
Derwent Abstract of EP 239,905, 10/7/87.

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