logo

For the Inventor, By the Inventor

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 4918208 B1

PDFFull Text
Date of Patent:
Apr. 17, 1990

Filed:

Jul. 22, 1988

Process for producing 7-dimethylamino-6-demethyl-6-deoxytetracycline

Applicant:
Inventors:

Ryoichi Hasegawa, Yono, JP;

Hiroaki Ohno, Tokyo, JP;

Kazuaki Sano, Hoya, JP;

Yoshinori Saito, Yono, JP;

Assignee:

Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;

Attorney:

Nields; Henry C.

Primary Examiner:

Richard L Raymond

Assistant Examiner:

Raymond Covington

Int. Cl.
CPC ...
C01D / ;
U.S. Cl.
CPC ...
552205 ; 552206 ;
Abstract

A process for producing 7-dimethylamino-6-demethyl-6-deoxytetracycline (minocycline) which comprises treating the reaction liquid containing minocycline and formaldehyde with hydroxylamine or urea, the reaction liquid being obtained after reductive methylation of 7-amino-6-demethyl-6-deoxytetracycline by using aldehyde, then subjecting the reaction liquid to an adsorption treatment with a nonionic adsorption resin (adsorbent), and subsequently eluting the intended product adsorbed to the adsorbent.

Find Patent Forward Citations

Hasegawa, Ryoichi. (1990). Process for producing 7-dimethylamino-6-demethyl-6-deoxytetracycline (U.S. Patent No. 4918208). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4918208

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Loading…