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:
Mar. 11, 1980
Filed:
Jun. 29, 1978
Applicant:
Inventors:
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546249 ;
Abstract
A process for the production of 3-hydroxy-5-chloropyridine and 3-hydroxy-5-bromopyridine is disclosed which process comprises reacting 2-furfurylamine in aqueous mineral-acid solution at -20.degree. to +5.degree. C. with chlorine or bromine, neutralizing the hydrohalic acid formed, heating the reaction mixture at reflux temperature, and isolating the formed 3-hydroxy-5-halopyridine. The 3-hydroxy-5-halopyridines obtained are intermediates for the production of insecticides.