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:
Dec. 16, 1997
Filed:
Jul. 18, 1996
Applicant:
Inventors:
Yuki Takuma, Fukuoka, JP;
Yuzo Kasuga, Fukuoka, JP;
Takeki Miyazaki, Fukuoka, JP;
Yuji Mizuho, Fukuoka, JP;
Ken Okamoto, Fukuoka, JP;
Assignee:
Mitsubishi Chemical Corporation, Toyko, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544402 ; 544390 ;
Abstract
2-Cyanopiperazine represented by the following formula (1): ##STR1## or a salt thereof. The 2-cyanopiperazine can be produced by reacting a 2-halogenoacrylonitrile with ethylenediamine or by reacting a 2,3-dihalogenopropionitrile with ethylenediamine. The 2-cyanopiperazine is useful as an intermediate for medicaments, agricultural chemicals, etc., and optically active N-tert-butyl-2-piperazine carboxamide, which is useful as an intermediate in preparation of the HIV protease inhibitor indinavir, can be easily produced using the 2-cyanopiperazine.