Process for the preparation of (3-fluoropyridin-2-yloxy)phenoxyp

Details Process for the preparation of (3-fluoropyridin-2-yloxy)phenoxyp Process for the preparation of (3-fluoropyridin-2-yloxy)phenoxyp

1992-11-12

1993-12-28

Ivy, C. Warren

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21364

Patent

active

052741001

ABSTRACT:
(3-Fluoropyridin-2-yloxy)phenoxypropionic acids of formula I ##STR1## wherein X is hydrogen, fluoro, chloro, bromo or trifluoromethyl and Y is hydrogen, sodium or potassium, are prepared by reacting a compound of formula II ##STR2## wherein X and Y are as defined for formula I, in an anhydrous mixture of hydrogen fluoride, dimethylsulfoxide and a diazotising agent under normal pressure, and converting the diazonium fluoride so produced by thermal decomposition into the (3-fluoropyridin-2-yloxy)phenoxypropionic acid of formula I.

REFERENCES:
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patent: 4640703 (1987-02-01), Bohner et al.
patent: 4759796 (1988-07-01), Bohner et al.
patent: 4831148 (1989-05-01), Schurter et al.
Ferm et al., J. American Chem. Soc., 72, p. 4809, (1950).

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