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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 4789740 B1

PDFFull Text
Date of Patent:
Dec. 06, 1988

Filed:

Mar. 09, 1987

Halogenation process for preparing

Applicant:
Inventors:

Sigeru Torii, Okayama, JP;

Hideo Tanaka, Okayama, JP;

Yuzuru Ogata, Tokushima, JP;

Michio Sasaoka, Tokushima, JP;

Norio Saito, Tokushima, JP;

Shigemitsu Nagao, Tokushima, JP;

Assignee:

Otsuka Kagaku Yakuhin Kabushiki Kaisha, Osaka, JP;

Attorney:

Larson and Taylor

Primary Examiner:

Mark L Berch

Int. Cl.
CPC ...
C07B / ; C07D / ;
U.S. Cl.
CPC ...
540358 ; 260694 ;
Abstract

A process for preparing an azetidinone derivative represented by the formula (I) ##STR1## wherein R.sup.1 represents an aryl group, arylmethyl group or aryloxymethyl group, R.sup.2 represents hydrogen atom or a carboxyl-protecting group and R.sup.3 represents an alkyl group or aryl group, the process comprising reacting an azetidinone derivative represented by the formula (II) ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3 are as defined above with a chlorinating agent.

Find Patent Forward Citations

Torii, Sigeru. (1988). Halogenation process for preparing (U.S. Patent No. 4789740). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4789740

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