<i>ansa</i>‐Ruthenium(II) Complexes of DPEN‐SO₂N(Me)(CH₂)_n(η⁶‐aryl) Conjugate Ligands for Asymmetric Transfer Hydrogenation of Aryl Ketones

Abstract

Abstract A diversified ansa ‐ruthenium(II) catalyst series 1b–f displaying enantiopure N , C ‐( N ‐alkylene‐ N ‐methylsulfamoyl)‐tethered (DPEN‐κ 2 N , N ′)/η 6 ‐arene (DPEN= trans ‐1,2‐diphenylethylenediamine) hybrid ligands was screened in the transfer hydrogenation of alkyl aryl ketones, and α‐ or β‐diketones in formic acid‐triethylamine (HCO 2 H‐Et 3 N) medium under mild conditions and furnished the alcohols in high to excellent ee s. magnified image