| abstract |
Total synthesis of known progestationally active steroidal materials. The steroids can be synthesized depending on the particular starting reactants selected by employing as intermediates bicyclic compounds of the formula WHEREIN M IS AN INTEGER HAVING A VALUE OF 1 TO 2 R4 is hydrogen or lower alkyl Z is lower alkylenedioxy, CH(OR2) and carbonyl R8 when taken alone is hydrogen R9 when taken alone is lower alkoxycarbonyl, aryloxy-carbonyl, lower cycloalkyloxycarbonyl, carbonyl-halide, hydrogen, carboxy, formyl and methylene-X, where X is a leaving group and when taken together are methylene with the proviso that when Z is carbonyl R8 when taken alone is hydrogen R8 when taken alone is carbonyl halide, hydrogen, carboxy, formyl and methylene-X where X is a leaving group and when taken together are methylene and R2 is hydrogen, lower alkyl, lower alkoxy-lower alkyl, phenyl-lower alkyl, tetrahydropyranyl, lower alkanoyl, benzoyl, nitrobenzoyl, carboxy-lower alkanoyl, carboxy-benzoyl, trifluoroacetyl and camphorsulfonyl AND REACTING THEM IN THE CASE WHERE R8 and R9 taken together are methylene or R8 is hydrogen and R9 is methylene-X with beta -keto esters and other analogs of the formula WHEREIN R8 is selected from the group consisting of AND LOWER ALKYL R7 is lower alkyl R15 is selected from the group consisting of oxo, lower alkylenedioxy or (hydrogen and lower alkoxy) B is selected from the group consisting of lower alkoxy-carbonylmethylene, lower-aryloxy-carbonyl-methylene, cyanomethylene, lower alkyl sulfinyl-methylene, lower alkyl sulfonyl-methylene, and R25 and R26 are independently selected from the group consisting of hydrogen, hydroxyl and lower alkyl. |