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:
Oct. 16, 1990
Filed:
Feb. 07, 1989
Applicant:
Inventors:
Yoshiharu Morita, Yokohama, JP;
Naoshi Imaki, Atsugi, JP;
Tadashi Shirasaka, Machida, JP;
Tetsuro Shimpuku, Yokohama, JP;
Assignee:
Mitsubishi Kasei Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546 90 ; 514291 ;
Abstract
A process for preparing cotarnine is provided which comprises oxidizing the amino group of a tetrahydroisoquinoline compound represented by the following formula (I): ##STR1## to convert said compound into a dihydroisoquinolinium salt represented by the following formula (II): ##STR2## wherein A.sup.- represents an anion, and then hydrolyzing said dihydroisoquinolinium salt.