Benzylic Fluorination of Aza-Heterocycles Induced by Single-Electron Transfer to Selectfluor
作者:Kelley E. Danahy、Julian C. Cooper、Jeffrey F. Van Humbeck
DOI:10.1002/anie.201801280
日期:2018.4.23
A selective and mild method for the benzylic fluorination of aromatic azaheterocycles with Selectfluor is described. These reactions take place by a previously unreported mechanism, in which electron transfer from the heterocyclic substrate to the electrophilic fluorinating agent Selectfluor eventually yields a benzylic radical, thus leading to the desired C−F bond formation. This mechanism enables
描述了一种使用 Selectfluor 对芳香氮杂杂环进行苄基氟化的选择性温和方法。这些反应通过以前未报道的机制发生,其中电子从杂环底物转移到亲电子氟化剂 Selectfluor 最终产生苄基自由基,从而导致所需的 CF 键形成。这种机制使氮杂杂环比具有相似 C-H 键解离能的其他苄基组分具有更高的分子内和分子间选择性。