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
Based on systematic electrochemical analysis, an integrated synthetic platform of C(sp3)-based organoboron compounds was established for the introduction of heteroatoms. The electrochemically mediated bond-forming strategy was shown to be highly effective for the functionalization of sp3-hybridized carbon atoms with significant steric hindrance. Moreover, virtually all the nonmetallic heteroatoms could