The titled compounds (1, 2) have been prepared from estrone by the new synthetic routes. Introduction of a hydroxyl group into the 15α-position was readily attained by hydroboration of the 14, 15-or 15, 16-double bond with diborane and subsequent oxidation of the organoborane with alkaline hydrogen peroxide. In the preparation of 1 the dimethyl-tert-butylsilyl function was conveniently employed for the purpose of protecting the 3, 17β-hydroxyl groups.
通过新的合成路线,我们从
雌酮中制备出了标题化合物(1、2)。用二
硼烷对 14、15 或 15、16-双键进行氢
硼化合,然后用碱性
过氧化氢对有机
硼烷进行氧化,很容易在 15α 位上引入羟基。在制备 1 的过程中,为了保护 3、17β-羟基,方便地使用了二甲基叔丁基
硅烷官能团。