对称化
对映选择合成
立体中心
化学
分子间力
配体(生物化学)
催化作用
组合化学
镍
立体化学
功能群
群(周期表)
手性(物理)
立体异构
氘
动力学分辨率
均相催化
药效团
碳纤维
动力学同位素效应
不对称氢化
金属
四级碳
广场互动
有机化学
螯合作用
作者
Erwan Brunard,Fengjie Huang,Àlex Díaz‐Jiménez,Sofiya Kostiukovska,Joanna Wencel‐Delord
标识
DOI:10.1002/anie.202523241
摘要
We report the first example of an intermolecular, enantioselective Ni(II)-catalyzed C(sp3)─H arylation, providing direct access to challenging all-carbon quaternary stereogenic centers. Key to this success is the use of a specially designed BINOL-derived ligand, which enables efficient desymmetrization of gem-dimethyl groups through a rate- and enantio-determining C─H activation step. This catalytic system demonstrates remarkable functional group tolerance, affording a wide variety of arylated products in high yields (up to 85%) and with excellent enantioselectivities (up to 95:5 e.r.). Mechanistic studies, combining kinetic isotope effect measurements, deuterium labeling, and DFT calculations, reveal that the Ni-BINOL complex promotes a unique concerted metalation-deprotonation pathway assisted by ligand coordination and π-π interactions. This work establishes nickel as a powerful and sustainable alternative to precious metals for asymmetric C─H activation, opening new perspectives for the construction of enantioenriched quaternary carbon centers of high relevance in drug discovery and materials science.
科研通智能强力驱动
Strongly Powered by AbleSci AI