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:
Feb. 26, 1985
Filed:
Jul. 07, 1981
Derek H Barton, Gif sur Yvette, FR;
William B Motherwell, Gif sur Yvette, FR;
Sammir Z Zard, Gif sur Yvette, FR;
Roussel Uclaf, Paris, FR;
Abstract
Novel 20-isocyano-.DELTA..sup.17(20) -steroids of the formula ##STR1## wherein R.sup.1 is selected from the group consisting of (1) hydrogen, (2) alkyl of 1 to 4 carbon atoms optionally substituted with a member of the group consisting of halogen, an oxygen function and a nitrogen function and (3) alkenyl and alkynyl of 2 to 4 carbon atoms, R.sub.2 is alkyl of 1 to 4 carbon atoms, Alk.sub.1, is alkyl of 1 to 8 carbon atoms and the A,B,C, and D rings may contain one or more double bonds and may be optionally substituted with at least one member of the group consisting of --OH, .dbd.0, halogens, alkyl and alkoxy of 1 to 4 carbon atoms and alkenyl and alkynyl of 2 to 4 carbon atoms and a process for their preparation and their use to prepare 17.alpha.-ol-20-keto steroids.