Asymmetric Transfer Hydrogenation of 1-Naphthyl Ketones by an ansa-Ru(II) Complex of a DPEN-SO2N(Me)-(CH2)2(η6-p-Tol) Combined Ligand
摘要:
The first second-generation designer Ru(II) catalyst 1b featuring an enantiopure N,C-(N-ethylene-N-methyl-sulfamoyI)-tethered (DPEN-k(2)N,N)/n(6)toluene hybrid ligand Is introduced. Using an SIC 1000 in HCO2H Et3N 5:2 transfer hydrogenation medium, secondary 1-naphthyl alcohols are obtained in up to >99.9% ee under mild conditions. Mechanistic factors are discussed.
Copper‐Catalyzed Enantioselective C(sp<sup>3</sup>)−SCF<sub>3</sub> Coupling of Carbon‐Centered Benzyl Radicals with (Me<sub>4</sub>N)SCF<sub>3</sub>
作者:Wei Zhang、Yu Tian、Xiao‐Dong Liu、Cheng Luan、Ji‐Ren Liu、Qiang‐Shuai Gu、Zhong‐Liang Li、Xin‐Yuan Liu
DOI:10.1002/anie.202319850
日期:2024.3.11
A copper-catalyzed enantioselective radical C(sp3)−SCF3 coupling of secondary/tertiary benzyl radicals with the easily available (Me4N)SCF3 reagent was developed to afford enantioenriched trifluoromethylthiolated molecules. The key to the success lies in the utilization of chiral phosphino-oxazoline-derived anionic N,N,P-ligands for the reaction initiation and enantioselectivity.