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:
Feb. 03, 1981
Filed:
Jan. 29, 1979
Thomas D Bailey, Indianapolis, IN (US);
Reilly Tar & Chemical Corp., Indianapolis, IN (US);
Abstract
One process comprises the step of reacting an amount of 5-carboxy-2-pyridone directly with both a suitable chlorinating agent and a suitable fluorinating agent to selectively transform both the 5-carboxy group and the 2-positioned oxygen function of the ring. A second process comprises the steps of reacting an amount of 5-carboxy-2-pyridone with a suitable fluorinating agent to selectively transform the 5-carboxy group without altering the 2-positioned oxygen function of the ring and reacting the 5-trifluoromethyl-2-pyridone thereby formed with a suitable chlorinating agent to cause 2-chloro-5-trifluoromethylpyridine to form. A third process comprises the steps of reacting an amount of a 5-carboxy-2-pyrone compound with a suitable fluorinating agent to selectively transform the 5-carboxy group without altering the 2-positioned oxygen function of the ring, reacting the 5-trifluoromethyl-2-pyrone compound thereby formed with an ammonia-containing agent in the presence of a caustic material to cause 5-trifluoromethyl-2-pyridone to form, and reacting the 5-trifluoromethyl-2-pyridone thereby formed with a suitable chlorinating agent to cause 2-chloro-5-trifluoromethylpyridine to form.