dl-17α-Ethynyl-17β-hydroxy-13β-allylgon-4-en-3-one (XXIV) was synthesized via 17β, 2'-epoxy pentaene (X). The double bonds at C-14 and -8 of X was hydrogenated sequentially by conventional methods. 17β, 2'-Epoxy triene (XIII) was treated with p-toluenesulfonic acid in acetic anhydride to give 13β-allylgonane (XIV) as a major product. Birch reduction of the tetrahydropyranyl ether (XIX) followed by acid treatment yielded the 4-en-3-one compound (XXI), which was oxidized with chromium trioxidepyridine complex to the 17-ketone (XXII). The enol ether (XXIII) was treated with lithium acetylide in ethylenediamine, and then with acid to yield XXIV. The progestational activity of XXIV is as potent as norgestrel.
dl-17α-
乙炔基-17β-羟基-13β-烯丙基-4-烯-3-酮(XXIV)通过17β,2'-环氧
戊烯(X)合成。X的C-14和-8的双键通过常规方法依次氢化。17β,2'-环氧
三烯(XIII)在
乙酸酐中用
对甲苯磺酸处理,得到13β-烯丙基-4-烯-3-酮(XIV)为主要产物。
四氢吡喃基醚(XIX)的桦木还原,然后进行酸处理,得到4-烯-3-酮化合物(XXI),用
三氧化铬吡啶络合物将其氧化为17-酮(XXII)。烯醇醚(XXIII)在
乙二胺中用
乙炔锂处理,然后用酸处理,得到XXIV。XXIV的孕激素活性与
诺孕酮一样强。