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. 13, 1976
Filed:
Dec. 23, 1974
Applicant:
Inventor:
Harold H Freedman, Newton Center, MA (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2602 / ;
Abstract
The reaction between the alkali metal halopyridinates with the lower alkyl esters of .alpha.-chloro or bromo acetic acid (or propionic acid) to form the corresponding O-alkylated halopyridinates is catalyzed by quaternary ammonium salts. For example, methyl .alpha.-(6-chloropyridinyloxy)acetate was prepared in excellent yield by reacting sodium 6-chloropyridinate with excess methyl .alpha.-chloroacetate in the presence of 2 mole percent of benzyl triethyl ammonium chloride.
Freedman, Harold. (1976). Catalyzed alkylation of halopyridinates (U.S. Patent No. 3969360). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3969360
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile