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. 26, 1991
Filed:
Jan. 09, 1989
Applicant:
Inventors:
Teruo Umemoto, Sagamihara, JP;
Kyoichi Tomita, Sagamihara, JP;
Kosuke Kawada, Hon, JP;
Ginjiro Tomizawa, Wako, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
546-9 ; 546 22 ; 546116 ; 546102 ; 546153 ; 546155 ; 546157 ; 546168 ; 546170 ; 546180 ; 546286 ; 546287 ; 546321 ; 546326 ; 546345 ; 546346 ; 546347 ;
Abstract
A pyridine-compound is reacted with fluorine together with a Bronsted acid-compound or Lewis acid to form a N-fluoropyridinium salt which is very active to other compounds but is very selective for the preparation of a desired product and this product is very useful for a fluorine-introducing agent which makes it useful for the preparation of fluoro-compounds such as thyroid inhibitor.