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:
Sep. 20, 1988
Filed:
Feb. 10, 1986
Robert Hesse, Cambridge, MA (US);
Research Institute for Medicine and Chemistry Inc., Cambridge, MA (US);
Abstract
Compounds of the general formula ##STR1## wherein R represents a hydrogen atom or a hydroxyl protecting group, Y represents a hydrogen atom or an optionally protected hydroxyl group, X represents the residue of a dienophile and either R.sup.1 represents a halogen atom a hydrocarbylsulphonyloxy group or a group of the formula --Z--R.sup.3 (in which Z represents --O--, --S--, --SO--, --NR.sup.4 -- or --CR.sup.4 R.sup.5 -- and R.sup.3, R.sup.4 and R.sup.5, which may be the same or different, each represent a hydrogen atom or a straight or branched aliphatic group having 1-12 carbon atoms and which may optionally carry one or more substituents) and R.sup.2 represents a hydrogen atom or R.sup.1 and R.sup.2 together represent an oxo group or an optionally substituted alkylidene group, except that R.sup.1 and R.sup.2 together with the group --CH(CH.sub.3)CH-- to which they are attached do not represent a group having the branched 17.beta.-hydrocarbyl side chain skeleton of vitamin D.sub.2 or vitamin D.sub.3 or use in the preparation of novel vitamin D analogues.