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:
Sep. 30, 1997
Filed:
Feb. 21, 1996
Applicant:
Inventors:
Hiroki Hotta, Yono, JP;
Hiroyasu Sugizaki, Tokyo, JP;
Tetsuya Toya, Yono, JP;
Mikio Yanagi, Okegawa, JP;
Assignees:
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Sankyo Company, Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07C / ;
U.S. Cl.
CPC ...
549402 ; 549362 ; 549398 ; 549405 ; 564148 ; 564149 ; 564150 ;
Abstract
The present invention can provide a process for the preparation of an 1-acyl-2-substituted hydrazine compound from a mixture containing the 1-acyl-2-substituted hydrazine and an 1-acyl-1-substituted hydrazine by selective hydrolysis or alcoholysis of the 1-acyl-yl-1-substituted hydrazine in the presence of an acid catalyst, and by separation of the resulting carboxylic acid and derivative thereof. The 1-acyl-2-alkyl hydrazine obtained has a high purity.