Process for the preparation of diphenyl ethers

Details Process for the preparation of diphenyl ethers Process for the preparation of diphenyl ethers

1983-11-23

1986-01-14

Helfin, Bernard

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

Organic compounds

Oxygen containing

568639, 568433, 568592, 260465F, 560 61, C07C 4116

Patent

active

045647127

ABSTRACT:
Diphenyl ethers are prepared by Ullmann reaction of alkali metal phenolates with halobenzenes in the presence of basic copper carbonate and/or copper salts of lower aliphatic carboxylic acids as catalysts. These special catalysts have a better catalytic activity than other copper catalysts known for the Ullmann reaction.
The diphenyl ethers prepared or obtainable according to the invention are mainly intermediates in diverse fields such as pharmaceuticals or plant protecting agents.

REFERENCES:
patent: 3083234 (1963-03-01), Sax
patent: 3487114 (1969-12-01), Irick, Jr. et al.
patent: 3499840 (1970-03-01), Williams et al.
patent: 4266082 (1981-05-01), Collin et al.
patent: 4316994 (1982-02-01), Fuchs et al.
The Condensed Chemical Dictionary 8th Ed. (1971) 234.
Elenevskii et al., Chem. Abs. vol. 32 (1938) 7904.
M. A. Elenevskii et al., Zh. Obsc. Chim., vol. VIII, No. 6, pp. 507-509 (1938).
Gmelins Handbuch der Anorganischen Chemie--Kupfer-Teil B-Lieferung 2 (1961), Cover page and p. 663.
Weston et al., Jour. Amer. Chem. Soc., vol. 50, (1928), pp. 859-866.

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