The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2002
Filed:
May. 04, 2000
Nippon Finechemical Co., Ltd., Tokyo, JP;
Abstract
A process for the preparation of an aromatic thiophenol represented by the formula (I): Y —Ar—(SH) (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): Y —Ar—(SR) (II), wherein R represents a monovalent secondary or tertiary hydrocarbyl, or a monovalent primary hydrocarbyl group represented by the formula: —CH —R or —CH —CR ═C (R ) , wherein R represents a monovalent aromatic ring group optionally substituted by a monovalent hydrocarbyl group, and each of R 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 product from step (a).