(1b–1e) was first developed. All compounds were synthesized from commercially available 2,4,6-trihydroxyacetophenone; formylation at 3′ position under Vilsmeier–Haack conditions was followed by the introduction of a methyl group at 5′ position. The key step of selective methylation at 2′ position was achieved by trimethylsilyldiazomethane (TMSCHN2). Then substituted aromatic aldehydes were condensed
摘要 3'-甲酰基-4',6'-二羟基-2'-甲氧基-5'-甲基
查尔酮(
FMC)是从Cleistocalyx operculatus中分离得到的
天然产物。首先开发了针对
FMC 及其四种类似物 (1b-1e) 的四步合成策略。所有化合物均由市售的 2,4,6-三羟基
苯乙酮合成;在 Vilsmeier-Haack 条件下在 3' 位置进行甲酰化,然后在 5' 位置引入甲基。2'位选择性甲基化的关键步骤是通过三甲基甲
硅烷基
重氮甲烷(TMSCHN2)实现的。然后在
氢氧化钾存在下通过克莱森-施密特反应使取代的芳香醛缩合。所有结构均通过 1H NMR、13C NMR 和高分辨率质谱确认。筛选
FMC 和类似物的抗增殖活性。图形概要