Process for preparing diphenyl ethers

Details Process for preparing diphenyl ethers Process for preparing diphenyl ethers

1991-10-29

1993-02-02

Fan, Jane T.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30788

Patent

active

051839075

ABSTRACT:
Diphenyl ether derivatives of formula II ##STR1## wherein R.sub.1 represents a hydrogen or halogen atom or an alkyl or haloalkyl group, R.sub.2 and R.sub.3, which may be the same or different, each independently represents a hydrogen or halogen atom, or an alkyl, haloalkyl, nitro or cyano group, and R.sub.6 represents a hydrogen atom or an alkyl group, useful as intermediates in the preparation of diphenyl ether herbicides, are prepared by treating a compound of formula III ##STR2## where R.sub.1, R.sub.2 and R.sub.3 are as defined above with a dicarboxylic acid of formula R.sub.6 --CH(COOH).sub.2, where R.sub.6 is as defined above, in the presence of an organic base.

REFERENCES:
patent: 4298530 (1981-11-01), Iwasaki et al.
Organic Reactions vol. 15, chapter 2, pp. 206, 210, John Wiley & Sons, Inc.

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