Polychloropyridine production from polychloro-2,3-lutidines

Details Polychloropyridine production from polychloro-2,3-lutidines Polychloropyridine production from polychloro-2,3-lutidines

1986-07-22

1987-11-10

Jiles, Henry R.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21172

Patent

active

047058595

ABSTRACT:
Polychloropyridines containing chlorine substituents in the 2, 3, and 6 positions and, optionally, in the 4 and 5 positions, are prepared from polychloro-2,3-lutidines containing at least one chlorine substituent in each methyl group and, optionally, a chlorine substituent in the 6 position by liquid phase chlorination. Lewis acid metal halide catalysts are, optionally, employed. 2,3,5,6-Tetrachloropyridine is, accordingly, prepared by chlorination at about 200.degree. to about 260.degree. C. in the presence of ferric chloride catalyst of a mixture of polychloro-2,3-lutidines obtained by the vapor phase chlorination of 2,3-lutidine.

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