Process for the preparation of aromatic sulfur compounds
US6376716B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2000 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | May 4, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C319/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of an aromatic thiophenol represented by the formula (I): Yn—Ar—(SH)m(I), wherein Ar represents an aromatic hydrocarbon; Y represents at least one substituent bonded to a carbon atom constituting the aromatic ring of Ar, which substituent is selected from the group consisting of halogen, nitro, nitrile, sulfone, sulfamoyl and hydrocarbylsulfonyl groups; m is an integer of 1 or more; and n is an integer of 1 or more, which comprises (a) reacting an aromatic thioether represented by the formula (II): Yn—Ar—(SR)m(II), wherein R represents a monovalent secondary or tertiary hydrocarbyl, or a monovalent primary hydrocarbyl group represented by the formula: —CH2—R1 or —CH2—CR2═C (R2)2, wherein R1 represents a monovalent aromatic ring group optionally substituted by a monovalent hydrocarbyl group, and each of R2 is the same or different from each other and represents hydrogen or a monovalent hydrocarbyl group, with (A) a Lewis acid in the presence of a solvent or with a protonic acid, provided that when (A) is a protonic acid, R is not a primary hydrocarbyl group, and (b) optionally hydrolyzing the reaction…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.