Method of preparing esters of aryloxyphenoxy propanoic acid

Details Method of preparing esters of aryloxyphenoxy propanoic acid Method of preparing esters of aryloxyphenoxy propanoic acid

1985-04-11

1987-07-21

Rothman, Alan L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546301, 546303, 560 61, 560 62, C07D21355, C07D21364

Patent

active

046819410

ABSTRACT:
An improved method of preparing aryloxyphenoxy propanoic acid esters is disclosed. Low-water levels and low temperatures increase the yield and decrease by-product formation. A hindered non-nucleophilic phenol, which is converted in situ to the phenate form, is added to the reaction mixture to drive the reaction to 99+% conversion.

REFERENCES:
patent: 4046553 (1977-09-01), Takahashi et al.
patent: 4275212 (1981-06-01), Orvik et al.
patent: 4309547 (1982-01-01), Koch et al.
patent: 4410701 (1983-10-01), Krauss

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