| 摘要 |
<p>Preparing 17beta-spiro-1',2'-oxiranes of the oestrane series by reaction of 17-keto-oestranes with excess of diMe-sulphuronium-methylide in a solvent, e.g. diMe-sulphoxide or THF at -10 to +20 deg., pref. at 0 deg. 3-Methoxy-oestra-1,3,5(10)-trien-17beta-spiro-1',2'-oxirane (I) (specifically claimed).</p> |
