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. 03, 1998
Filed:
Sep. 09, 1994
Sven Ring, Jena, DE;
Gerhard Teichmueller, Jena, DE;
Gisela Weber, Jena, DE;
Sigfrid Schwarz, Jena, DE;
Bernd Erhart, Kahla, DE;
Bernd Undeutsch, Jena, DE;
Harald Raethe, Jena, DE;
Peter Moellmann, Jena, DE;
Carmen Pfeiffer, Grossromstedt, DE;
Hans-Joachim Palme, Jena, DE;
Jenapharm GmbH, Jena, DE;
Abstract
The invention is directed to novel steroid intermediate products of general formula I ##STR1## The steroid intermediate products which can be isolated according to the invention are suitable for the synthesis of 13-ethyl-11-methylene-18,19-bisnor-17.alpha.-pregn-4-en-20-in-17-ol (desogestrel). Further, processes for producing the steroid intermediate products of general formula I are described. The olefination of the 11-oxo steroids is carried out under the influence of ultrasound.