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:
Aug. 31, 1993
Filed:
Nov. 15, 1990
Seisaku Kumai, Fujisawa, JP;
Masao Ohashi, Chigasaki, JP;
Yutaka Yaginuma, Chigasaki, JP;
Katsuhiko Takeda, Fujisawa, JP;
Asahi Glass Company Ltd., Tokyo, JP;
Seimi Chemical Co., Ltd., Chigasaki, JP;
Abstract
A process for producing a 5-fluorobenzoic acid of the formula (V), which comprises trichloromethylating a fluorobenzene of the formula (I) to obtain a 5-fluorobenzotrichloride of the formula (II), then reacting it with aqueous ammonia to obtain a 5-fluorobenzonitrile of the formula (III), reacting it with a fluorinating agent to obtain a 5-fluorobenzonitrile of the formula (IV) and hydrolyzing it: ##STR1## wherein each of X.sub.1, X.sub.3, Y.sub.1 and Y.sub.3 is a halogen atom, and each of X.sub.2 and Y.sub.2 is hydrogen or a halogen atom.