(EN) 9$g(a), 11$g(b) and 11$g(b)-susbstituted estranes which exhibit elevated estrogenic and postcoital contraceptive activities. A process for their manufacture and their use in pharmaceuticals is also disclosed.(FR) Des oestrones 9$g(a), 11$g(b) et 11$g(b) substituées présentent des effets oestrogènes et contraceptifs prononcés après des rapports sexuels. L'invention concerne également leur procédé de production et d'utilisation dans des substances pharmaceutiques.
作者:Richard H. Peters、David F. Crowe、Mitchell A. Avery、Wesley K. M. Chong、Masato Tanabe
DOI:10.1021/jm00130a014
日期:1989.10
Various estrane derivatives 1 reacted with cerium ammonium nitrate (CAN) selectively and efficiently to provide 9 alpha,11 beta-defunctionalized derivatives 2, which were subsequently deoxygenated at C-9 with triethylsilane/boron trifluoride etherate to the desired target 11 beta-nitratoestranes 3a, 3b, and 5. When examined for estrogenic and postcoital antifertility activity, 11 beta-nitrates 2c, 2d, and 3b most notably displayed more potent oral activity than did ethynylestradiol.