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. 21, 1989
Filed:
Sep. 19, 1986
Applicant:
Inventor:
David N Jones, Sheffield, GB;
Assignee:
The University of Sheffield, Sheffield, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
549336 ; 560255 ; 568327 ; 568633 ; 568808 ;
Abstract
Total synthesis of steroids with substitution in the 2,3, 6, 11 or 17 positions comprising the step of cyclization of a compound having the formula ##STR1## or analogues thereof, where X represents .dbd.O, ##STR2## or .beta.-substituted ##STR3## Y represents .dbd.O, .beta.-oriented ##STR4## or .beta.-orientated OH, R' and R.sup.2 may be the same or different and R' represents alkyl or aryl and R.sup.2 represents alkyl and Z represents ether or hindered ester to form the novel compounds ##STR5##