Despite intensive studies on the synthesis of 3-formylindoles, it is still highly desirable to develop efficient methods for the formylation of indoles, due to the shortcomings of the reported methods, such as inconvenient operations and/or harsh reaction conditions. Here, we describe a Ph3P/ICH2CH2I-promoted formylation of indoles with DMF under mild conditions. A Vilsmeier-type intermediate is readily
尽管对 3-甲酰基
吲哚的合成进行了深入研究,但由于报道的方法存在操作不便和/或反应条件苛刻等缺点,仍然非常需要开发用于
吲哚甲酰化的有效方法。在这里,我们描述了在温和条件下用
DMF 对
吲哚进行 Ph3P/ICH2CH2I 促进的甲酰化。在 Ph3P/ICH2CH2I 系统的促进下,
DMF 很容易形成 Vilsmeier 型中间体。各种富电子
吲哚均可采用一步甲酰化工艺,但缺电子
吲哚需要进行第二步
水解。方便的操作使该协议具有吸引力。