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:
Jan. 02, 1990
Filed:
Jun. 15, 1987
Applicant:
Inventors:
John G Mullin, Jr, Hawthorne, NJ (US);
Keiji Nakamura, Kamakura, JP;
Jefferson W Tilley, North Caldwell, NJ (US);
Hiroshi Watanabe, Chigasaki, JP;
Assignee:
Hoffmann-La Roche Inc., Nutley, NJ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546329 ; 544242 ; 548341 ; 548342 ;
Abstract
Compounds of the formula ##STR1## wherein R.sub.2, R.sub.3 and R.sub.4 are independently, hydrogen or methyl; A is 3-pyridinyl which is unsubstituted, or substituted by lower alkyl, phenyl, or naphthyl, are described. The compounds of the invention are intermediates in the preparation of antiarrhythmic agents.