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:
May. 27, 2008
Filed:
Sep. 08, 2006
Applicants:
Takanori Ogawa, Tokyo, JP;
Hiroyuki Nishiyama, Tokyo, JP;
Miyuki Uchida, Tokyo, JP;
Seigo Sawada, Tokyo, JP;
Inventors:
Takanori Ogawa, Tokyo, JP;
Hiroyuki Nishiyama, Tokyo, JP;
Miyuki Uchida, Tokyo, JP;
Seigo Sawada, Tokyo, JP;
Assignee:
Kabushiki Kaisha Yakult Honsha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 209/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention is to prepare efficiently 2'-amino-5′-hydroxypropiophenone corresponding to the AB-ring part of camptothecin (CPT) skeleton and a tricyclic ketone corresponding to the CDE-ring part in order to provide efficiently CPT by the total synthesis, which is a starting material for irinotecan hydrochloride and various kinds of camptothecin derivatives, and to provide stably CPT and its derivatives.