Process for producing aromatic disulfides
US6444853B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2001 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Apr 4, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C319/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to a process for the preparation of aromatic disulfides represented by the formula (II):Yn—Ar—S—S—Ar—Yn  (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):Yn—Ar—S—R  (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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.