Convergent Total Syntheses of the Amaryllidaceae Alkaloids Lycoranine A, Lycoranine B, and 2-Methoxypratosine
作者:Hye Sun Kim、Martin G. Banwell、Anthony C. Willis
DOI:10.1021/jo4006987
日期:2013.5.17
and 3 respectively, have been prepared in a convergent manner by two related routes. The superior one involves C–H functionalization of the relevant 5-methoxyindole at C-7 using Hartwig’s protocol and thus forming the corresponding borolated indole that could be coupled with the requisite 2-bromobenzoate to deliver the title natural products. Single crystal X-ray analyses of the synthetically derived
标题生物碱,1,2,和3已经分别以会聚的方式通过两个相关的途径制备。上等产品涉及使用Hartwig的规程在C-7处将相关的5-甲氧基吲哚进行C–H官能化,从而形成相应的硼化吲哚,可与必需的2-溴苯甲酸酯偶联以提供标题的天然产物。报道了化合物1和2的合成衍生样品的单晶X射线分析。