The present invention is concerned with 11-aryloestrane and 11-arylpregnane derivatives, characterized in that these derivatives have the following structure: ##STR1## wherein R.sub.1 is an aryl group with an ##STR2## group as substituent, X and Y each being separately H or a (1-4 C) hydrocarbon radical or together a (2-6 C) hydrocarbon radical; R.sub.2 is an alkyl group containing 1-4 carbon atoms; R.sub.3 is H, OH, a saturated or unsaturated hydrocarbon radical containing 1-8 carbon atoms, at least provided with a hydroxyl, oxo, halogen, azido or nitrile group; an acyloxy or an alkoxy group; R.sub.4 is a hydroxyl, an acyloxy or an alkoxy group or an acyl group optionally provided with a hydroxyl, alkoxy, acyloxy or halogen group; or R.sub.3 and R.sub.4 together form a ring system; and R.sub.5 is a hydrocarbon group containing 1-4 carbon atoms, and further with processes for the preparation of these compounds and with pharmaceutical preparations comprising these compounds. The compounds according to the present invention exhibit antiprogestin activity.
                            本发明涉及11-芳基
雌甾烷和11-芳基
孕甾烷衍
生物,其特征在于这些衍
生物具有以下结构:##STR1##其中,R.sub.1是一个带有##STR2##取代基的芳基基团,X和Y分别为H或(1-4C)碳氢基团,或者一起为(2-6C)碳氢基团;R.sub.2是含有1-4个碳原子的烷基基团;R.sub.3是H、OH、含有1-8个碳原子的饱和或不饱和碳氢基团,至少具有一个羟基、氧代基、卤素、
叠氮或腈基团;或者是酰氧基或烷氧基;R.sub.4是羟基、酰氧基或烷氧基或者是酰基基团,可选择地具有羟基、烷氧基、酰氧基或卤素基团;或者R.sub.3和R.sub.4一起形成一个环系统;R.sub.5是含有1-4个碳原子的碳氢基团,并且还包括制备这些化合物的过程以及包含这些化合物的制药制剂。本发明的化合物具有抗孕激素活性。