SYNTHESIS OF STEROIDS AND INTERMEDIATES THEROF
Total synthesis of steroids with substitution in the 2,3, 6, 11 or 17 positions comprising the step of cyclization of a compound having the formula
  or analogues thereof where X represents
   Y represents =0, β-orientated
  β-orientated OH, R'and R 2  may be the same or different and R' represents alkyl or aryl and R 2  represents alkyl and Z represents ether or hindered ester to form the novel compounds
 