Electrophilic C12 Building Blocks for Alkaloids: 1,1 Iterative Organoiron-Mediated Routes to (±)-Lycoramine and (±)-Maritidine
作者:G. Richard Stephenson、Caroline Roe、Elizabeth J. Sandoe
DOI:10.1002/ejoc.201001394
日期:2011.3
were used to prepare ortho-substituted (1-arylcyclohexadienyl) iron(1+) electrophiles. These were treated with Na+[Me3SiCH2CH2O2CCHCN](-) to build aryl-substituted quaternary centres in new examples of 1,1 iterative [eta(4)] -> [eta(5)]+ -> [eta(4)] -> [eta(5)]+ -> [eta(4)]} reaction sequences, which make use of the electrophilicity of the metal complex in two key carbon-carbon bond-formation steps
从受保护的 6-溴愈创木酚和 2-溴-4,5-二甲氧基苄醇衍生物生成的芳基锂试剂用于制备邻位取代的 (1-芳基环己二烯基) 铁 (1+) 亲电子试剂。这些用 Na+[Me3SiCH2CH2O2CCHCN](-) 处理以在 1,1 迭代 [eta(4)] -> [eta(5)]+ -> [eta(4)] 的新例子中构建芳基取代的四元中心-> [eta(5)]+ -> [eta(4)]} 反应序列,在两个关键的碳-碳键形成步骤中利用金属配合物的亲电性。愈创木酚的 MOM 保护在进入石蒜胺骨架方面优于 SEM,TBDPS 最适合马里替丁。解络、水解和环化完成石蒜科生物碱 (+/-)-lycoramine 和 (+/-)-marididine 的正式全合成,