This invention relates to steroids of the pregnane and 19-norpregnane series having anaesthetic properties and compositions containing them. More particularly the present invention relates to such steroids having a variety of substituents in the 2.beta.-position, a 3.alpha.-hydroxy group and a 5.alpha.-hydrogen atom and esters and 20-ketals thereof. At the 11-position of such steroids is preferably either two hydrogen atoms or an oxo group. The compounds according to the invention may conveniently be prepared by reaction of an appropriate 2.alpha.,3.alpha.-epoxy-pregnane or 19-norpregnane with a reagent which introduces the desired 2.beta.-substituent and various modifications of the compound produced are described to produce compounds within the scope of the invention. The present invention provides compositions containing certain steroids of the pregnane and 19-norpregnane series and such compositions generally may be administered intravenously to induce anaesthesia, the invention providing methods of inducing anaesthesia.
这项发明涉及具有麻醉特性的孕烷和19-去甲孕烷系列类
固醇以及含有它们的组合物。更具体地,本发明涉及具有2.beta.-位上各种取代基、3.alpha.-羟基和5.alpha.-氢原子以及其酯和20-酮
缩醛的类
固醇。在这种类
固醇的11位上最好是两个氢原子或一个酮基团。根据本发明的化合物可以通过将适当的2.alpha.,3.alpha.-环氧孕烷或19-去甲孕烷与引入所需的2.beta.-取代基的试剂反应来方便地制备,并描述了所产生化合物的各种修饰以制备属于本发明范围内的化合物。本发明提供了含有孕烷和19-去甲孕烷系列某些类
固醇的组合物,这些组合物通常可通过静脉注射来诱导麻醉,本发明提供了诱导麻醉的方法。