Yttrium‐Catalyzed
<i>ortho</i>
‐Selective C−H Borylation of Pyridines with Pinacolborane
作者:Yuncong Luo、Shengjie Jiang、Xin Xu
DOI:10.1002/anie.202117750
日期:2022.5.16
The ortho-selective C−Hborylation of a wide range of pyridines using pinacolborane was achieved through yttrium catalysis. Notably, the possible hydroboration side reaction was effectively suppressed by using the proper ligand/metal combination. The resultant 2-pyridyl boronates were subjected to further transformations such as a Suzuki–Miyaura coupling or the Chan–Lam amination.
作者:Merle Arrowsmith、Michael S. Hill、Terrance Hadlington、Gabriele Kociok-Köhn、Catherine Weetman
DOI:10.1021/om2008138
日期:2011.11.14
Reaction of catalytic quantities of a beta-diketiminato n-butylmagnesium complex with pinacol-borane in the presence of pyridine derivatives provides facile access to borylated dihydropyridines. The reaction is applicable to a wide range of monocyclic and fused-ring pyridine derivatives and catalytic turnover is proposed to occur through a well-defined sequence of Mg-H/pyridine dearomatization and Mg-N/B-H sigma bond metathesis steps.