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. 24, 1995
Filed:
Jun. 02, 1993
Applicant:
Inventors:
Jean Buendia, Le Perreux Sur Marne, FR;
Jean-Yves Godard, Le Raincy, FR;
Philippe Mackiewicz, Livry Gargan, FR;
Christian Richard, Rosny Sous Bois, FR;
Assignee:
Roussel-Uclaf, , FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07J / ;
U.S. Cl.
CPC ...
552556 ; 552552 ; 552544 ; 435 52 ; 435 54 ; 435 58 ;
Abstract
An improved process for the preparation of 20-keto-21(S)-hydroxy steroids of the Formula ##STR1## wherein R.sub.1 is alkyl of 1 to 3 carbon atoms, R.sub.2 is alkyl of 1 to 12 carbon atoms, and R.sub.3 is alkyl of 1 to 4 carbon atoms and novel intermediates therefrom.