Method of preparation of 3,5-dichloro-2,4,6-trifluoropyridine

Details Method of preparation of 3,5-dichloro-2,4,6-trifluoropyridine Method of preparation of 3,5-dichloro-2,4,6-trifluoropyridine

1986-10-22

1988-05-24

Ford, John M.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21361

Patent

active

047467444

ABSTRACT:
The preparation of 3,5-dichloro-2,4,6-trifluoropyridine from pentachloropyridine and potassium fluoride was found to proceed in high yield and at a rapid rate with little tar formation when the reaction is conducted under essentially anhydrous conditions in N-methylpyrrolidone solvent at temperatures below 170.degree. C. High yields of this intermediate for herbicides are obtained.

REFERENCES:
patent: 3303197 (1967-02-01), Haszeldine et al.
Finger, et al., J. Org. Chem., 28, 1666-1668.
Chambers, et al., J. Chem. Soc., 3573-6, 1964.
Banks, et al., J. Chem. Soc., 594-7, 1965.
Banks, et al., Chemisty & Industy, 835, 1964.
Chambers, et al., Proc. Chem. Soc., 83, 1964.

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