Process for the manufacture of diphenyl ethers

Details Process for the manufacture of diphenyl ethers Process for the manufacture of diphenyl ethers

1977-12-21

1979-10-30

Helfin, Bernard

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

Organic compounds

Oxygen containing

568586, C07C 4104

Patent

active

041729595

ABSTRACT:
Hydroquinone mono-phenyl ethers, and their alkali metal salts of the formula ##STR1## in which one of the radicals R.sub.1 and R.sub.2 denotes trifluoromethyl and the other denotes hydrogen or halogen and R.sub.3 represents hydrogen or an alkali metal cation or ammonium cation are prepared by reacting hydroquinone bis-phenyl ethers (bisphenoxybenzenes) of the formula ##STR2## with hydroquinone derivatives of the formula ##STR3## in which Cat denotes an alkali metal cation or ammonium cation and R.sub.4 denotes an alkali metal cation or ammonium cation or a (C.sub.1 -C.sub.4)-alkyl group, in a polar aprotic solvent at temperatures from 120.degree. to 280.degree. C., and optionally, an alkyl group present in the R.sub.4 -position is split off by treatment with an acid.

REFERENCES:
Z. Obsc. Chim., vol. 34 (1964), 10, 3390.
Z. Org. Chim., vol. 1, (1965), 5, 901.
Gould, Mechanism and Structure in Organic Chemistry, (1959), 216-219.
McBee et al., J.A.C.S., vol. 73 (1951), 1325-1326.

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