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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.:

US 5672723 B1

PDFFull Text
Date of Patent:
Sep. 30, 1997

Filed:

Feb. 21, 1996

Process for preparation of 1-acyl-2-substituted hydrazines

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:

Nields & Lemack

Primary Examiner:

Shailendra Kumar

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.

Find Patent Forward Citations

Hotta, Hiroki. (1997). Process for preparation of 1-acyl-2-substituted hydrazines (U.S. Patent No. 5672723). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5672723

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