| abstract |
New hormonal steroids of the formula wherein R is hydrogen or lower alkyl, R 2 is hydrogen or chlorine, R 6 is hydrogen, fluorine or methyl and R ' 6 is hydrogen, a- or β-methyl, methylene or a-hydroxy. the dashed bonds in the A and D ring are optional, but the D ring can only be unsaturated when R 16 is methyl, and their preparation starting from the corresponding 17a-hydroxysteroids unsubstituted in the 9-position. |