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:
Jul. 13, 1999
Filed:
Jan. 20, 1998
Applicant:
Inventors:
Assignee:
Koei Chemical Co., Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544390 ; 544406 ;
Abstract
A process for preparing a N-tert-butyl-2-pyrazinecarboxamide having the formula (2): ##STR1## which comprises reacting a cyanopyrazine having the formula (1): ##STR2## with tert-butyl alcohol in the presence of sulfuric acid and a process for preparing a N-tert-butyl-2-piperazine-carboxamide having the formula (3): ##STR3## which comprises hydrogenating of said N-tert-butyl-2-pyrazinecarboxamide having the formula (2) in the presence of Raney nickel or Raney cobalt.