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. 20, 1990
Filed:
Jun. 03, 1988
Applicant:
Inventors:
Assignee:
Bayer Aktiengesellschaft, Leverkusen-Bayerwerk, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562432 ;
Abstract
A process for the preparation of 2-arylthiobenzoic acids which are useful as intermediates in producing thioxanthene compounds comprises reacting by reacting lithium 2-chlorobenzoate of the formula ##STR1## with lithium thiophenoxide of the formula ##STR2## wherein R is alkyl having 1 to 4 carbon atoms, alkoxy having 1 to 4 carbon atoms, trifluoromethyl, hydrogen, fluorine, chlorine or nitro and
Bauer, Wolfgang. (1990). Process for the preparation of 2-arylthiobenzoic acids (U.S. Patent No. 4902826). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4902826
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