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:
May. 12, 1987
Filed:
Oct. 18, 1985
Applicant:
Inventors:
Kenzi Makino, Shiki, JP;
Shigeaki Akiyama, Narashino, JP;
Kenzow Fukuda, Narashino, JP;
Gozyo Sakata, Kokubunji, JP;
Assignee:
Nissan Chemical Industries Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560 61 ; 562471 ;
Abstract
A process for preparing a 2-(4-hydroxyphenoxy) alkanoic acid, its ester or alkali metal salt, or an optical isomer thereof, which comprises condensing hydroquinone or an alkali metal salt of hydroquinone with a compound having the formula: ##STR1## wherein X is a p-toluenesulfonyl group, a methanesulfonyl group, a benzylsulfonyl group, a p-chlorobenzenesulfonyl group or a benzenesulfonyl group, R.sup.1 is a hydrogen atom or a lower alkyl group, and R.sup.2 is a hydrogen atom, an alkyl group or an alkali metal cation, or its optical isomer in the presence of a base.