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:
Nov. 27, 1990
Filed:
Jan. 30, 1989
Applicant:
Inventors:
Ryuzo Ueno, Nishinomiya, JP;
Hiroaki Tsuchiya, Kobe, JP;
Shigeru Itoh, Nishinomiya, JP;
Ichiro Yamamoto, Takarazuka, JP;
Assignee:
Kabushiki Kaisha Veno Seiyaku Oyo Kenkyuo, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560 67 ;
Abstract
Highly pure benzyl esters of aromatic hydroxycarboxylic acids are produced in high yields by reacting an aromatic hydroxycarboxylic acid or its lower alkyl ester with a benzyl alcohol in the presence of an organotin compound of the general formula ##STR1## wherein R's are identical or different and each represents an alkyl group having 1 to 8 carbon atoms or an aryl group, and Z represents an oxygen or sulfur atom, an organotin compound of the general formula