Process for producing aromatic disulfides

• Main Authors: HIDA YOKO, ARAI ISAMU, YAMAGUCHI TUTOMU
• Format: Patent
• Language: English
• Published: 03.09.2002
• Edition: 7
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

This invention relates to a process for the preparation of aromatic disulfides represented by the formula (II):wherein Ar represents a hydrocarbon aromatic ring group;Y represents a monovalent electrophilic group, and when n is 2 or more, a plural number of Y's may be the same or different from each other; and n is an integer of 1 to 12,which comprises allowing(A) an aromatic thioether represented by the formula (I):wherein Y, Ar and n have the same meanings as defined above; and R represents a monovalent hydrocarbyl group selected from the group consisting of a monovalent tertiary hydrocarbyl group, and benzyl group and a monovalent secondary hydrocarbyl group derived from benzyl group;to react with(B) at least one of the following (1) to (4):(1) bromine;(2)(a) hydrogen bromide and (b) hydrogen peroxide;(3)(c) chlorine, in the presence of a catalytic amount of iodine and/or hydrogen iodide;(4)(d) hydrogen chloride and (b) hydrogen peroxide, in the presence of a catalytic amount of iodine and/or hydrogen iodide.