| 摘要 |
PCT No. PCT/EP98/08527 Sec. 371 Date Aug. 27, 1999 Sec. 102(e) Date Aug. 27, 1999 PCT Filed Dec. 17, 1998 PCT Pub. No. WO99/35161 PCT Pub. Date Jul. 15, 1999A process for producing a compound of formula (I): wherein the dotted lines - - - independently represent a single or double bond and R, R1, R2 and R3 are each hydrogen or an organic radical, comprises treating the corresponding 17 beta -carbonylimidazole intermediates with anhydrous acids in the presence of an amine and, optionally, hydrogenating the resulting compound. |
