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. 11, 1991
Filed:
Apr. 02, 1990
Applicant:
Inventors:
Oswy Z Pereira, Hounslow, GB;
Michael V Ramsay, South Harrow, GB;
Stephen Freeman, High Wycombe, GB;
Assignee:
American Cyanamid Company, , ME (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549264 ;
Abstract
A process for preparing a compound of formula (I) ##STR1## (where (i) R.sup.1 is an ethoxy group and R.sup.2 is a hydrogen atom, (ii) R.sup.1 is a hydrogen atom and R.sup.2 is a bromine atom or (iii) (R.sup.1 and R.sup.2 together with the carbon atom to which they are attached represent>C.dbd.O) which comprises stereoselectively reducing the corresponding 5-keto compound.