Stereochemistry of Steroids containing Aromatic A-Ring. II. Reaction of 9α, 11α-Epoxyestrone.
作者:Hiroko Hasegawa、Shigeo Nozoe、Kyosuke Tsuda
DOI:10.1248/cpb.11.1037
日期:——
The reduction of 3-hydroxy-9α, 11α-epoxyestra-1, 3, 5 (10)-trien-17-one (III) with lithium aluminum hydride gave estra-1, 3, 5 (10)-triene-3, 11α, 17β-triol. The reaction of III with hydrogen chloride in methanol yielded 3-hydroxy-9β-estra-1, 3, 5 (10)-triene-11, 17-dione (IXa). On the other hand, the reaction in chloroform afforded 9ξ-chloro-3, 11α-dihydroxyestra-1, 3, 5 (10)-trien-17-one (VIIIa). With alkali 3-hydroxyestra-1, 3, 5 (10)-triene-11, 17-dione (Va) is converted into 9β-isomer (IXa).
3-羟基-9α,11α-环氧雌甾-1,3,5(10)-三烯-17-酮(III)与氢化铝锂反应生成雌甾-1,3,5(10)-三烯-3,11α,17β-三醇。III与甲醇中的氯化氢反应生成3-羟基-9β-雌甾-1,3,5(10)-三烯-11,17-二酮(IXa)。另一方面,在氯仿中的反应生成9ξ-氯-3,11α-二羟基雌甾-1,3,5(10)-三烯-17-酮(VIIIa)。在碱的作用下,3-羟基雌甾-1,3,5(10)-三烯-11,17-二酮(Va)转化为9β-异构体(IXa)。