structural skeletons. Herein, we report a visible-light-induced dual acylation of alkenes for constructing 3-substituted chroman-4-ones, which undergoes a radical tandem cyclization reaction through carbon–carbon bond cleavage of oxime esters by a nitrogen-centered radical strategy. A series of 3-substituted chroman-4-ones were prepared with up to 86% yield.
杂环化合物,尤其是含氧
杂环化合物,是
生物活性化合物和药物先导化合物中的关键部分。取代的 chroman-4-ones 是一种最重要的结构骨架。在此,我们报道了一种可见光诱导的烯烃双酰化,用于构建 3-取代的 chroman-4-one,其通过以氮为中心的自由基策略通过
肟酯的碳-碳键裂解发生自由基串联环化反应。以高达 86% 的产率制备了一系列 3-取代的 chroman-4-ones。