Synthesis of 4-hydroxyestrogens from steroid 4,5-epoxides: thermal rearrangement of 4-chloro-4,5-epoxides
作者:Helena Majgier-Baranowska、John N. Bridson、Kirk Marat、John F. Templeton
DOI:10.1039/a709186i
日期:——
The synthesis of 4-hydroxyestrone and 4-hydroxyestradiol from estr-4-ene-3,17-dione through the 4,5-epoxyestra-3,17-diones is described. Thermolysis of 4-chloro-4,5-epoxyestra-3,17-diones also gives 4-hydroxyestrone, but in lower yield, together with 4-hydroxyestra-4,6-diene-3,17-dione and the B ring aromatic product, estra-5,7,9-triene-4,17-dione. Structures have been established by NMR methods except
描述了从雌激素-4-烯-3,17-二酮通过4,5-环氧雌-3,17-二酮合成4-羟基雌酮和4-羟基雌二醇。4-氯-4,5-环氧-3,17-二酮的热解还产生4-羟基雌酮,但产率较低,与4-羟基-4,6-二烯-3,17-二酮和B环芳族化合物一起产品,estra-5,7,9-三烯-4,17-二酮。除了通过X射线晶体学分析确定的4β-氯-4,5-环氧-5α-雌三-3,17-二酮的结构以外,已经通过NMR方法确定了结构。