This invention discloses the first example of palladium(II)-catalyzed β-C(sp3)-H iodination or arylation of a wide range of ketones by using a commercially available aminooxyacetic acid auxiliary. This L, X-type directing group overcomes the limitation of the transient directing group approach for -βC(sp3)-H functionalization of ketones. Practical advantages of this method include simple installation of the auxiliary without chromatography, exceptional tolerance of a-functional groups, double bonds and triple bonds and rapid access to diverse sterically hindered quaternary centers.
本发明首次公开了利用市售的
氨基氧
乙酸助剂,通过
钯(II)催化β-C(sp3)-H
碘化或芳基化多种酮的实例。这种 L、X 型定向基克服了瞬时定向基在酮的βC(sp3)-H 功能化方面的局限性。这种方法的实际优势包括:无需色谱法即可简单地安装辅助剂,对 a 官能基、双键和三键具有极强的耐受性,以及可快速获得各种立体受阻的季中心。