| abstract |
PCT No. PCT/EP97/04342 Sec. 371 Date Feb. 11, 1999 Sec. 102(e) Date Feb. 11, 1999 PCT Filed Aug. 11, 1997 PCT Pub. No. WO98/06738 PCT Pub. Date Feb. 19, 1998Process for the production of drospirenone (6 beta , 7 beta ; 15 beta , 16 beta -dimethylene-3-oxo-17 alpha -pregn-4-ene-21, 17-carbolactone, DRSP) (1) and 7 alpha -(3-hydroxy-1-propyl)-6 beta , 7 beta ; 15 beta , 16 beta -dimethylene-5 beta -androstane-3 beta , 5, 17 beta -triol (ZK 92836) and 6 beta , 7 beta ; 15 beta , 16 beta -dimethylene-5 beta -hydroxy-3-oxo-17 alpha -androstane-21, 17-carbolactone (ZK 90965) as intermediate products of the process. |