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:
Jul. 25, 1989
Filed:
Jun. 05, 1986
Applicant:
Inventors:
Jean Maignan, Tremblay les Gonesse, FR;
Serge Restle, Aulnay Sous Bois, FR;
Michel Colin, Livry Gargan, FR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548209 ; 564189 ; 564191 ;
Abstract
A process for preparing a 4,5-tri or tetramethylene-4-isothiazoline-3-one comprises cyclizing a 2-alkyl or aralkyl thio-1-cycloalkene-1-carboxamide in the form of its sulfoxide in an organic solvent in the presence of a acid chloride and adding to the resulting 4,5-tri or tetramethylene-4-isothiazoline-3-one hydrochloride a mineral or organic base or water so as to free the 4,5-tri or tetramethylene-4-isothiazoline-3-one in the form of a free base.