functionalization is a significant hurdle that remains to be addressed in the field of Pd(II) catalysis. We report a Pd(II)-catalyzed synthesis of benzocyclobutenes by methylene-selective C(sp3)–H arylation of ketones. The reaction utilizes glycine as a transient directing group and a 2-pyridone ligand, which may govern the methylene selectivity by making intimate molecular associations with the substrate during concerted
亚甲基选择性 C-H 官能化是 Pd(II) 催化领域仍有待解决的重大障碍。我们报告了通过酮的亚甲基选择性 C(sp 3 )-H 芳基化合成
苯并环丁烯的 Pd(II) 催化。该反应利用甘
氨酸作为瞬态导向基团和 2-
吡啶酮
配体,这可以通过在协同
金属化-去质子化过程中与底物形成紧密的分子结合来控制亚甲基的选择性。该反应被证明对分子内亚甲基 C(sp 3 )-H 芳基化具有高度选择性,因此能够实现连续的 C(sp 3 )-H 官能化。