Synthesis of Bisflavanol-Type Natural Products and Their Analogues via Self-Coupling of C8-Methylol Catechin Derivatives
作者:Deng-Ming Huang、Hui-Jing Li、Yan Zhao、Yan-Chao Wu
DOI:10.1055/s-0037-1610707
日期:2019.8
acid-catalyzed catechin–formaldehyde condensation. A highly efficient and regioselective self-coupling of C8-methylol catechin derivatives is developed for the synthesis of dimeric flavanol analogues under metal-free and mild conditions. Its applicability is showcased by the efficient synthesis of bisflavanol-type natural products bis-8,8′-catechinylmethane, bis-8,8′-epicatechinylmethane, talienbisflavan A, and
抽象的 为在无金属和温和条件下合成二聚黄烷醇类似物,开发了C8-羟甲基儿茶素衍生物的高效和区域选择性自偶联。双黄烷醇型天然产物bis-8,8'-儿茶素甲烷,bis-8,8'-表儿茶素甲烷,talienbisflavan A和oolonghomobisflavan A的有效合成证明了其适用性。新颖的自偶联机理为酸催化的儿茶素-甲醛缩合反应中的经典Friedel-Crafts烷基化机理。 为在无金属和温和条件下合成二聚黄烷醇类似物,开发了C8-羟甲基儿茶素衍生物的高效和区域选择性自偶联。双黄烷醇型天然产物bis-8,8'-儿茶素甲烷,bis-8,8'-表儿茶素甲烷,talienbisflavan A和oolonghomobisflavan A的有效合成证明了其适用性。新颖的自偶联机理为酸催化的儿茶素-甲醛缩合反应中的经典Friedel-Crafts烷基化机理。