described. The halogen‐exchange fluorination proceeds efficiently in acetonitrile at room temperature under metal‐free conditions and exhibits a wide range of functional group compatibility. Furthermore, the reactions are highly selective in that alkyl chlorides and primary and secondary alkyl bromides remain intact. A radical mechanism is proposed for this selective fluorination.
描述了用Selectfluor对叔烷基
溴和
碘进行直接
氟化。室温下,在无
金属条件下,卤素交换
氟化在
乙腈中有效进行,并具有广泛的官能团相容性。此外,反应是高度选择性的,因为烷基
氯化物以及伯和仲烷基
溴化物保持完整。对于这种选择性
氟化,提出了一种自由基机理。