Process for the preparation of 2,2'-bis(4-substituted phenol)sulfides
AssigneeMitsui Toatsu Chemicals, Inc.
InventorsAkihiro Yamaguchi, Tadashi Kobayashi, Keizaburo Yamaguchi, Hisamichi Murakami
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Abstract
Disclosed is a process for the preparation of 2,2'-bis(4-substituted phenol)sulfides which comprises reacting a 4-substituted phenol with sulfur dichloride in a hydrocarbon solvent at a temperature of from -10.degree. to 40.degree. C. in the presence of a Lewis acid catalyst. For example, 2,2'-bis(4-cumylphenol)-sulfide, i.e. 2,2'-bis(4-.alpha.,.alpha.-dimethyl benzyl-phenol)monosulfide, which is a novel compound can be prepared by reacting 4-cumylphenol with sulfur dichloride in benzene at a temperature of from 0.degree.to 10.degree. C. in the presence of zinc chloride.
Claims14
Process for the preparation of 2,2'-bis(4-substituted phenol)sulfides of purity of the order of 93.5-98.5% and of the general formula ##STR5## where R is an alkyl radical having from 1 to 12 carbon atoms, a cycloalkyl radical having from 3 to 12 carbon atoms, or an aralkyl radical having from 7 to 11 carbon atoms, which comprises the step of reacting a 4-substituted phenol of the general formula ##STR6## where R is the same as above, with sulfur dichloride in a molar ratio of 2 moles of phenol per 0.8-1.5 moles of sulfur dichloride in a hydrocarbon solvent or a halogenated hydrocarbon solvent at a temperature of from -10.degree. to 40.degree. C. and in the presence of a Lewis acid catalyst.
Dependencies are inferred from the claim text.