Process for the preparation of 17-haloethynyl steroids, and novel
申请人:Schering Aktiengesellschaft
公开号:US04567002A1
公开(公告)日:1986-01-28
17-haloethynyl steroids of the partial formula ##STR1## wherein R.sub.1 is hydrogen or methyl, R.sub.2 is alkyl of 1-4 carbon atoms, acyl of 1-7 carbon atoms, trimethylsilyl, 2-tetrahydropyranyl, or nitrate, X is bromine or iodine, and V is methylene, ethylene, vinylene, ethylidene, vinylidene or cyclopropylene, can be prepared by treating an ethynyl steroid of the partial formula ##STR2## wherein R.sub.1, R.sub.2, and V are as defined above, in an inert solvent with a brominating agent or an iodinating agent in the presence of a silver salt. Certain new compounds are also provided.
Die 17α-(Bromethinyl)- und 17α-(Chlorethinyl)-17β-(nitrooxy)-androsten-Derivate 2c–f setzen sich in Ameisensäure/N-Methyl-2-pyrroliden bei Raumtemperatur mit Silbersalzen zu den 21-Halogen-17α-(formyloxy)-20-ketopregnanen 3a–d um, aus denen über die 17α-Hydroxy-Verbindungen 3a–h die 21-Acetoxy-17α-hydroxy-20-ketone 3i und 3j erhalten werden. – Während die zu 2c analogen 17α-(Bromethinyl)-17β-benzoate