Proton or Carbene Transfer? On the Dark and Light Reaction of Diazoalkanes with Alcohols
作者:Claire Empel、Chao Pei、Feifei He、Sripati Jana、Rene M. Koenigs
DOI:10.1002/chem.202104397
日期:2022.3.10
O-H Functionalization: In this combined experimental and computational study, the reaction of diaryl diazoalkanes with alcohols is reported. In the ground state, a direct proton transfer governs reactivity with acidic HFIP. On the contrary, photoexcitation leads to formation of a triplet carbene intermediate that undergoes an alcohol-assisted intersystem crossing to a solvent-stabilized carbene that
OH 官能化:在这项实验和计算相结合的研究中,报道了二芳基重氮烷与醇的反应。在基态下,直接质子转移控制与酸性 HFIP 的反应性。相反,光激发导致三线态卡宾中间体的形成,该中间体经历醇辅助的系间窜越到溶剂稳定的卡宾,从而导致高产率的光化学OH官能化反应。