Process for producing 2,3,5-trichloropyridine, 2,4,4-trichloro-4

Details Process for producing 2,3,5-trichloropyridine, 2,4,4-trichloro-4 Process for producing 2,3,5-trichloropyridine, 2,4,4-trichloro-4

1979-11-28

1981-01-13

Jiles, Henry R.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

2604657, C07D21361

Patent

active

042450985

ABSTRACT:
A novel process for producing 2,3,5-trichloropyridine is described. The process comprises the addition reaction of trichloroacetaldehyde with acrylonitrile in the presence of a catalyst, and the subsequent cyclization of the intermediately formed 2,4,4-trichloro-4-formylbutyronitrile, with the splitting-off of water, to give 2,3,5-trichloropyridine.
2,4,4-Trichloro-4-formylbutyronitrile occurring as an intermediate product in the process according to the invention is a novel compound. It can be produced by the addition reaction of trichloroacetaldehyde with acrylonitrile in the presence of a catalyst.
2,3,5-Trichloropyridine can be used as intermediate for the production of herbicidal active substances.

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Ruth "Ann. der Chemie", vol. 486, pp. 71-75, (1931).
O. Fischer, "Ber. Dtsch. Chem. Ges.", vol. 31, pp. 609-612, (1898).
O. Fischer, "Ber. Dtsch. Chem. Ges.", vol. 32, pp. 1297-1307, (1899).

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