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:
Aug. 23, 1983
Filed:
Nov. 27, 1981
Applicant:
Inventors:
Assignee:
Societe Nationale des Poudres et Explosifs, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2604 / ;
Abstract
According to the invention, phosgene is reacted with a mercaptan in the presence of a catalyst of the general formula: ##STR1## in which X=O or S and in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are, in particular, aliphatic, cycloaliphatic or aromatic groups or a hydrogen atom. The proportion of catalyst is 0.1 to 10 mol %, relative to the mercaptan, and the reaction is carried out at ambient temperature and at atmospheric pressure. The process, which can be made continuous, results in short residence times and in a high yield and a high purity. Thiochloroformates are applied essentially as intermediates for the synthesis of herbicidal compounds.