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:
Jan. 30, 2007
Filed:
Jan. 22, 2004
Applicants:
Michelangelo Scalone, Birsfelden, CH;
Thomas Albert Zeibig, Mutterstadt, DE;
Inventors:
Michelangelo Scalone, Birsfelden, CH;
Thomas Albert Zeibig, Mutterstadt, DE;
Assignee:
Hoffmann-La Roche Inc., Nutley, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D 209/88 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for the preparation heterocyclic indene analogs, especially with the preparation of 4-hydroxycarbazole or N-protected 4-hydroxycarbazole, involves cyclocarbonylation followed by saponification. This process avoids high temperatures and high catalyst loadings.