Production of 3,5,6-trichloropyridin-2 ol and novel intermediate

Details Production of 3,5,6-trichloropyridin-2 ol and novel intermediate Production of 3,5,6-trichloropyridin-2 ol and novel intermediate

1989-05-08

1991-05-21

Lee, Mary C.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546300, 546303, 546345, 558368, 558398, 558440, 558441, C07D21364

Patent

active

050177052

ABSTRACT:
Novel aryl and heteroaryl 4-cyano-2,2,4-trichlorobutyrates are prepared by reacting a corresponding aryl or heteroaryl trichloroacetate with acrylonitrile in the presence of a catalyst. Also provided is a novel process for producing 3,5,6-trichloropyridin-2-ol comprising cyclization of an aryl or heteroaryl 4-cyano-2,2,4-trichlorobutyrate in an inert organic solvent at elevated temperatures, in the presence of anhydrous hydrogen chloride.

REFERENCES:
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patent: 4245098 (1981-01-01), Steiner et al.
patent: 4327216 (1982-04-01), Martin
patent: 4360676 (1982-11-01), Martin et al.
patent: 4435573 (1984-03-01), Lysenko
patent: 4465186 (1987-05-01), Steiner
patent: 4468354 (1984-08-01), Lysenko
patent: 4469896 (1984-09-01), Steiner

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