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:
Sep. 17, 1991
Filed:
Jul. 12, 1990
Applicant:
Inventor:
George Krsek, Culver, IN (US);
Assignee:
Houba, Inc., Culver, IN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
550206 ; 552207 ;
Abstract
A process for the preparation of alpha-6-deoxytetracyclines from the corresponding 6-methylenetetracyclines is described using a silica-supported heterogeneous rhodium catalyst: ##STR1## The process stereospecifically produces the alpha epimers at higher yields while using lower rhodium metal levels than prior methods.