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:
Nov. 01, 2005
Filed:
Sep. 10, 2003
Applicants:
Ewa M. Osika, Cambridge, CA;
Walter G. Brouwer, Garrow Hill, GB;
Inventors:
Ewa M. Osika, Cambridge, CA;
Walter G. Brouwer, Garrow Hill, GB;
Assignee:
Crompton Co./Cie, Elmira, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D333/56 ;
U.S. Cl.
CPC ...
Abstract
A method is disclosed for the preparation of benzo[b]thiophenecarbodithioic esters of the formula:wherein R is alkyl, Ris hydrogen, halogen, or alkyl, R, R, R, and Rare independently selected from the group consisting of hydrogen, halogen, alkyl, alkoxy, alkylthio, trifluoromethyl, cyano, and aryl,wherein said method comprises reacting an equivalent of an S-thiol ester of the formula:with one-third of an equivalent of PS, 2 equivalents of at least one alkali metal carbonate, about 2.5 mole percent of a phase transfer catalyst, and a catalytic amount of water in hot toluene.