Steroids cclix11Part CCLVIII. J. Romo, L. Rodriguez-Hahn, P. Joseph-Nathan, M. Martínez and P. Crabbe. Bull. Soc.Chim. France (submitted for publication).. The synthesis of 5β,19 and 6β,19-cyclo steroids
作者:O. Halpern、P. Crabbé、A.D. Cross、I. Delfin、L. Cervantes、A. Bowers
DOI:10.1016/0039-128x(64)90022-4
日期:1964.7
Abstract The solvolysis of 3β,19-dihydroxyandrost-5-ene-17-one-3-acetate 19-tosylate (Ib) led to the Δ6-5, 19-cyclo steroid IIa or a variety of 6α-substituted 5,19-cyclopropanes V depending upon the reaction conditions. The possibility that these reactions proceed through an intermediate homoallylic bridged cation is discussed. The formation of 6β,19-cyclobutanes from 19-hydroxyandrost-4-ene 3,17-dione
摘要 3β,19-dihydroxyandrost-5-ene-17-one-3-acetate 19-tosylate (Ib) 的溶剂分解产生了 Δ6-5, 19-环类固醇 IIa 或各种 6α-取代的 5,19-环丙烷 V 取决于反应条件。讨论了这些反应通过中间同烯丙基桥接阳离子进行的可能性。描述了从 19-羟基雄甾醇-4-烯 3,17-二酮甲苯磺酸酯 (VIb) 形成 6β,19-环丁烷