Synthesis of galanthamine and related alkaloids - new approaches. I.
作者:Radoslav Vlahova、Dikran Krikorian、Grigor Spassov、Maja Chinova、Ioncho Vlahov、Stojan Parushev、Günther Snatzke、Ludger Ernst、Klaus Kieslich、Wolf-Rainer Abraham、William S. Sheldrick
DOI:10.1016/s0040-4020(01)81012-7
日期:1989.1
intermediates in the synthesis of galanthamine derivatives and gave dienone A in better yields than reported before. The -configuration of amide 3′ in crystalline state has been determined by X-ray diffraction. reduces A to the optically active (−)-epigalanthamine derivative C, whose absolute configuration was determined by Bijvoet's method. reduces to racemic B. With a mixture of racemic B and optically
保护基团的修饰和氧化偶联条件的改变在加兰他敏衍生物的合成中产生纯的结晶中间体,并以比以前报道的更好的产率得到了二烯酮A。结晶态的酰胺3'的-构型已经通过X射线衍射确定。将A还原为旋光性(-)-表兰硫胺衍生物C,其绝对构型由Bijvoet方法确定。降低外消旋乙。用外消旋B和旋光活性C的混合物。描述了其他一些微生物转化。