FREMGANGSMAATE VED FREMSTILLING AV 6-HALOGEN-PREGNANER

摘要

The invention relates to a new process for the preparation of 6&agr;- halo-3-keto-&Dgr;.sup.1,4 -pregnadiene-derivatives in two-steps- synthesis affording directly 6&agr;-halo-derivatives by reacting 3-keto- 9&bgr;,11&bgr;-oxido-&Dgr;.sup.1,4 -pregnadiene-derivatives with a suitable acylating or etherifying agent to give the corresponding new 3- enol-derivatives which are finally halogenated by using a suitable halogenating agent.