Novel 20-isocyano-.DELTA..sup.17(20) -steroids of the formula ##STR1## wherein R.sup.1 is selected from the group consisting of (1) hydrogen, (2) alkyl of 1 to 4 carbon atoms optionally substituted with a member of the group consisting of halogen, an oxygen function and a nitrogen function and (3) alkenyl and alkynyl of 2 to 4 carbon atoms, R.sub.2 is alkyl of 1 to 4 carbon atoms, Alk.sub.1, is alkyl of 1 to 8 carbon atoms and the A,B,C, and D rings may contain one or more double bonds and may be optionally substituted with at least one member of the group consisting of --OH, .dbd.0, halogens, alkyl and alkoxy of 1 to 4 carbon atoms and alkenyl and alkynyl of 2 to 4 carbon atoms and a process for their preparation and their use to prepare 17.alpha.-ol-20-keto steroids.
化合物的名称为Novel 20-isocyano-.DELTA..sup.17(20) -STeroids,
化学式为##STR1##,其中R.sup.1可选自以下组合:(1)氢,(2)1至4个碳原子的烷基,可选地用卤素、氧官能团和氮官能团中的一种取代,以及(3)2至4个碳原子的烯基和炔基,R.sub.2为1至4个碳原子的烷基,Alk.sub.1为1至8个碳原子的烷基,A、B、C和D环可以包含一个或多个双键,并且可以可选地用至少一种--OH、.dbd.0、卤素、1至4个碳原子的烷基和烷氧基以及2至4个碳原子的烯基和炔基中的一种取代,提供了一种制备它们的方法以及它们用于制备17.alpha.-ol-20-keto类
固醇的用途。