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:
Dec. 19, 2006
Filed:
May. 12, 2004
Applicants:
Chien-hsing Lin, Taipei County, TW;
Yung-fa Chen, Tainan County, TW;
Kau-ming Chen, Tainan County, TW;
Inventors:
Chien-Hsing Lin, Taipei County, TW;
Yung-Fa Chen, Tainan County, TW;
Kau-Ming Chen, Tainan County, TW;
Assignee:
Scinopharm Taiwan, Ltd., Tainan County, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 405/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
The key intermediate in any synthesis of Irinotecan is 7-ethyl-10-hydroxy-20(S)-camptothecin. A process for the efficient synthesis of this intermediate is demonstrated proceeding through readily available 20(S)-camptothecin. Various other tecan compounds may be made by use of corresponding 7-alkyl-10-hydroxy-20(S)-camptothecin intermediates.