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:
Jun. 20, 1995
Filed:
Jan. 31, 1990
Applicant:
Inventors:
Joel E Huber, Kalamazoo, MI (US);
Jeffrey A Fleming, Augusta, MI (US);
Assignee:
The Upjohn Company, Kalamazoo, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07J / ;
U.S. Cl.
CPC ...
552621 ; 552619 ; 552622 ;
Abstract
The present invention involves improved processes for the dehalogenation of 9.alpha.-halosteroids (I) ##STR1## to produce the corresponding 11.beta.-hydroxy steroids (II) ##STR2## which are known to be useful as pharmaceutical, where the improvements comprise (1) adding the 9.alpha.-halo steroid (I) to the chromium and (2) using catalytic amounts of chromium in the presence of a means of converting chromium (II) to chromium (III).