Amine‐Free, Directing‐Group‐Free and Redox‐Neutral α‐Alkylation of Saturated Cyclic Ketones
作者:Jia Qiao、Rui‐Nan Ci、Qi‐Chao Gan、Cheng Huang、Zan Liu、Hui‐Lan Hu、Chen Ye、Bin Chen、Chen‐Ho Tung、Li‐Zhu Wu
DOI:10.1002/anie.202305679
日期:2023.7.17
As a powerful complement to existing organic amine catalysis, direct activation of the α-C−H bonds of saturated cyclic ketones is realized for the first time in an amine-free and directing-group-free catalytic mode. The carbonyl group binds to a defect site of the quantum dot (QD) surface, selectively weakening the α-C−H bond, instead of the β-C−H bond, and exclusively generating an α-C radical under
作为现有有机胺催化的有力补充,首次以无胺和无导向基团的催化模式实现了饱和环酮α-C−H键的直接活化。羰基与量子点(QD)表面的缺陷位点结合,选择性地削弱α-C−H键,而不是β-C−H键,并在可见光照射下专门生成α-C自由基。这种独特的活化平台导致在氧化还原中性条件下选择性活化环酮的 α-C−H 键。