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:
Apr. 13, 2010
Filed:
Aug. 16, 2005
Applicants:
Daniella Gutman, Rishon Lezion, IL;
Rosa Cyjon, Haifa, IL;
Inventors:
Daniella Gutman, Rishon Lezion, IL;
Rosa Cyjon, Haifa, IL;
Assignee:
Taro Pharmaceutical Industries Limited, Haifa Bay, IL;
Primary Examiner:
Int. Cl.
CPC ...
C07D 209/88 (2006.01); C07D 403/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a rapid, high-yielding process for preparing 1,2,3,9-tetrahydro-9-methyl-3-methylene-4H-carbazol-4-one from 1,2,3,9-tetrahydro-9-methyl-4H-carbazol-4-one without using a secondary amine as a catalyst, and without using glacial acetic acid as a solvent. The present invention further provides a rapid, high-yielding process for preparing ondansetron from 1,2,3,9-tetrahydro-9-methyl-3-methylene-4H-carbazol-4-one without using alumina as a catalyst.