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. 09, 1994
Filed:
Dec. 26, 1991
Applicant:
Inventors:
Yukinori Saiki, Tokyo, JP;
Kazunori Nukui, Tokyo, JP;
Assignee:
Onoda Cement Co., Ltd., Onoda, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546286 ; 546287 ; 546288 ; 546289 ; 546290 ; 546294 ; 546295 ; 546296 ; 546297 ; 546298 ; 546300 ; 546309 ; 546340 ; 546345 ;
Abstract
N-fluoropyridinium salts of the following formula are prepared by reacting a pyridine compound with a Br nsted acid and fluorine, wherein the reaction solvent contains a greater than equimolar amount of the pyridine compound relative to an amount of the Br nsted acid. ##STR1## The method can produce N-fluoropyridinium salts with a high yield.