PROCESS FOR PREPARING D SU9(11) XX-AND/OR D SU16 XX- UNSATURATED STEROIDS

摘要

ABSTRACT OF THE DISCLOSUREThe invention provides a process for the preparationof .DELTA.9(11)- and/or .DELTA.16-unsaturated steroids from 9.alpha.-and 16.alpha.-chloro-or 17.alpha.-acyloxy steroids of the pregnane series which comprisesheating the starting steroid in an inert, aprotic high-boilingsolvent to 180-350°C.