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:
May. 11, 1976
Filed:
Feb. 18, 1975
Applicant:
Inventor:
Pasquale G Gallegra, San Jose, CA (US);
Assignee:
Syntex (U.S.A.) Inc., Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07J / ;
U.S. Cl.
CPC ...
26039745 ; 2602 / ;
Abstract
3-enol ethers of 11.beta.-hydroxy-.DELTA..sup.4 -pregnene-3-ones are prepared by reacting triethylorthoacetate with an 11.beta.-hydroxy-.DELTA..sup.4 -pregnene-3-one in a solvent which is at least 40% by weight or more ethanol and 60% by weight or less of a compatible oxygenated hydrocarbon liquid in the presence of an acid catalyst. This reaction forms a basis of a process for forming 6-halo-derivatives, particularly 6-chloro-.DELTA..sup.1,4,6 -pregnatrien -11.beta.,17.alpha.,21-triol-3,20-dione.
Gallegra, Pasquale. (1976). Process for preparing 3-enol ethers of 11.beta.-hydroxy-.delta..sup.4 (U.S. Patent No. 3956349). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3956349
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile