| abstract |
12a-substituted pregna-1,4-diene-3,20-dione of the general formulan wherein R is a hydrogen atom, R 1 CO or R 2 SO 2 where R 1 is a hydrogen atom, an alkyl group which may optionally be substituted or an aryl group which may optionally be sub- stitued and R 2 si an alkyl group. n These compounds are useful as intermediates for the synthesis of antiinflammatory corticoids such as prednisone, prednisolone, etc.. |