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:
Nov. 08, 1977
Filed:
Aug. 30, 1976
Applicant:
Inventors:
Hugh L Dryden, Jr, Deerfield, IL (US);
Mike G Scaros, Arlington Heights, IL (US);
Thomas J Telinski, Chicago, IL (US);
Assignee:
G. D. Searle & Co., Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07J / ;
U.S. Cl.
CPC ...
2602 / ; 26023957 ; 2602395 ;
Abstract
A new process for the preparation of 17.beta.-hydroxy-3-oxo-17.alpha.-pregn-4-ene-21-carboxylic acid .gamma.-lactone is described herein. The process makes use of androst-4-ene-3,17-dione as the starting material and 17.alpha.-ethynyl-17.beta.-hydroxyandrost-4-en-3-one as an early intermediate.