Process for preparing 2-(4-hydroxyphenoxy) alkanoic acid compoun

Details Process for preparing 2-(4-hydroxyphenoxy) alkanoic acid compoun Process for preparing 2-(4-hydroxyphenoxy) alkanoic acid compoun

1985-10-18

1987-05-12

Killos, Paul J.

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

Organic compounds

Carboxylic acid esters

562471, C07C 6976

Patent

active

046652124

ABSTRACT:
A process for preparing a 2-(4-hydroxyphenoxy) alkanoic acid, its ester or alkali metal salt, or an optical isomer thereof, which comprises condensing hydroquinone or an alkali metal salt of hydroquinone with a compound having the formula: ##STR1## wherein X is a p-toluenesulfonyl group, a methanesulfonyl group, a benzylsulfonyl group, a p-chlorobenzenesulfonyl group or a benzenesulfonyl group, R.sup.1 is a hydrogen atom or a lower alkyl group, and R.sup.2 is a hydrogen atom, an alkyl group or an alkali metal cation, or its optical isomer in the presence of a base.

REFERENCES:
patent: 3198823 (1965-08-01), Akabayashi et al.
patent: 4489207 (1984-12-01), Becker et al.
patent: 4532346 (1985-07-01), Rehn et al.

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