σ‐Holes in Iodonium Ylides: Halogen‐Bond Activation of Carboxylic Acids, Phenols and Thiophenols May Enable Their X−H Insertion Reactions
作者:Carlee A. Montgomery、Islam Jameel、Fabio Cuzzucoli、Tristan Chidley、W. Scott Hopkins、Graham K. Murphy
DOI:10.1002/chem.202202029
日期:2022.12.20
iodonium ylides to possess two σ-holes of differing potentials, situated along the extensions of their C−I bonds. Experimentation revealed that formal O−H or S−H insertion reactions were possible with carboxylic acids, phenols and thiophenols. Halogen-bond activation is presumed to be essential, resulting in α-substituted-β-dicarbonyls in 64 %–99 % yield in five minutes.
计算分析表明,碘鎓叶立德具有两个不同电位的 σ 孔,位于其 C−I 键的延伸线上。实验表明,正式的 O−H 或 S−H 插入反应可能与羧酸、酚类和苯硫酚有关。卤键活化被认为是必不可少的,导致 α-取代的-β-二羰基化合物在五分钟内以 64%–99% 的产率生成。