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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 4556514 B1

PDFFull Text
Date of Patent:
Dec. 03, 1985

Filed:

Oct. 13, 1983

4-carboxy azetidinone compounds and production thereof from diketene and

Applicant:
Inventors:

Makoto Sunagawa, Osaka, JP;

Koshiro Goda, Osaka, JP;

Masao Enomoto, Osaka, JP;

Akira Sasaki, Osaka, JP;

Assignee:

Sumitomo Chemical Company, Limited, Osaka, JP;

Attorney:

Sughrue, Mion, Zinn, Macpeak, and Seas

Primary Examiner:

Mark L Berch

Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2602 / ;
Abstract

.beta.-Lactam compounds which are useful as intermediates for the production of carbapenem or penem derivatives and a process for producing the same. The process comprises reacting a Schiff base with diketene in the presence of an imidazole, reducing the acetyl group of the resulting N-protected-3-acetyl-2-azetidinone-4-carboxylic acid ester, and removing the protecting group for a carboxyl group from the resulting 3-(1-hydroxyethyl)-2-azetidinone-4-carboxylic acid derivative.

Find Patent Forward Citations

Sunagawa, Makoto. (1985). 4-carboxy azetidinone compounds and production thereof from diketene and (U.S. Patent No. 4556514). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4556514

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