Cobalt‐Catalyzed Bis‐Borylation of Quinolines: The Importance of the Cobalt Triplet State
作者:Cassandre Cassiopée Bories、Geoffrey Gontard、Marion Barbazanges、Gilles Lemière、Marc Petit
DOI:10.1002/chem.202303178
日期:2023.12.11
dearomatization/functionalization is a huge challenge. We show here that the low-valent HCo(N2)(PPh3)3 is able to catalyze such bis-borylation process. NMR and labelling studies prove a 1,2-hydroboration/Markovnikov hydroboration cascade, starting from an in situ formed paramagnetic complex. DFT highlights the importance of a cobalt triplet state throughout the reaction, and bring rationalizations on the C4 selectivity
选择性串联喹啉脱芳构化/功能化是一个巨大的挑战。我们在此表明低价HCo(N 2 )(PPh 3 ) 3能够催化这种双硼酸化过程。 NMR 和标记研究证明了 1,2-硼氢化/马尔可夫尼科夫硼氢化级联,从原位形成的顺磁络合物开始。 DFT 强调了钴三重态在整个反应过程中的重要性,并为 C4 选择性带来了合理化。