NOVEL STEROID COMPOUND CONTAINING SULFINYL GROUP AT 23-POSITION THEREOF, ITS PRODUCTION, USE THEREOF IN PRODUCTION OF 20-KETOPREGNANE COMPOUND AND ITS INTERMEDIATE

摘要

A compound of the formula IMAGE I wherein R1 is hydrogen or methyl, R2 is methyl or ethyl, the A,B,C and D rings optionally have one or more double bonds and are optionally substituted with one or more members of the group consisting of halogen protected hydroxy, 1/8O, alkyl and alkoxy of 1 to 4 carbon atoms and alkenyl and alkynyl of 2 to 4 carbon atoms, R is selected from the group consisting of halogen, -OH, alkoxy of 1 to 6 carbon atoms, aralkoxy of 7 to 15 carbon atoms, alkylthio of 1 to 6 carbon atoms, arylthio of 6 to 14 carbon atoms, aralkylthio of 7 to 15 carbon atoms and IMAGE wherein R3 and R4 are individually selected from the group consisting of hydrogen, alkyl of 1 to 6 carbon atoms and aralkyl of 7 to 15 carbon atoms or R3 and R4 together with the nitrogen atom form another heterocycle optionally containing a nitrogen atom or oxygen atom and their preparation and their use to form 20-keto-pregnanes.