Enantioselective Borylation of Aromatic C−H Bonds with Chiral Dinitrogen Ligands
作者:Bo Su、Tai-Gang Zhou、Pei-Lin Xu、Zhang-Jie Shi、John F. Hartwig
DOI:10.1002/anie.201702628
日期:2017.6.12
The borylation of C−Hbonds catalyzed by transition metals has been investigated extensively in the past two decades, but no iridium‐catalyzed enantioselectiveborylation of C−Hbonds has been reported. We report a set of iridium‐catalyzed enantioselectiveborylations of aromaticC−Hbonds. This reaction relies on a set of newly developed chiral quinolyl oxazoline ligands. This process proceeds under
Enantioselective C(sp2)–H borylation of diarylmethylsilanes catalyzed by chiral pyridine-dihydroisoquinoline iridium complexes
作者:Dongseong Park、Doohyun Baek、Chi-Woo Lee、Huijeong Ryu、Seungchul Park、Woosong Han、Sukwon Hong
DOI:10.1016/j.tet.2020.131811
日期:2021.1
EnantioselectiveC(sp2)−Hborylations of diarylmethylsilanes were catalyzed using iridium complexes with chiral pyridine-dihydroisoquinoline (PyDHIQ) ligands. High enantioselectivities (up to >99% ee) were observed for various substrates. A gram-scale synthesis was achieved using 1 mol% of the catalyst to afford a 91% yield of the desired chiral borylated organosilane product with >99% ee.