Catalytic Enantioselective Oxidative Homocoupling of 2‐Acyl Imidazoles
作者:Nemrud Demirel、Jie Qin、Sergei I. Ivlev、Klaus Harms、Eric Meggers
DOI:10.1002/adsc.202100837
日期:2021.10.19
A diastereoselective and enantioselective construction of 2,3-disubstituted 1,4-dicarbonyl compounds is reported. Nishiyama's RuPhebox complex (2.0 mol% catalyst loading) serves as a chiral Lewis acid catalyst in conjunction with BrCCl3 and a base for the oxidative homocoupling of 2-acyl imidazoles via the stereocontrolled reaction of intermediate Ru enolates with in situ brominated 2-acyl imidazoles
New Bis(oxazolinyl)phenyl−Ruthenium(II) Complexes and Their Catalytic Activity for Enantioselective Hydrogenation and Transfer Hydrogenation of Ketones
作者:Jun-ichi Ito、Satoshi Ujiie、Hisao Nishiyama
DOI:10.1021/om800953f
日期:2009.1.26
Synthesis and characterization of ruthenium(II) complexes having a meridional bis(oxazolinyl)benzene (dm-Phebox-R)H (1a: R = ip, 1b: R = ph, 1c: R = dm; ip = isopropyl, dm = dimethyl, ph = phenyl) ligand and their applications to enantioselective hydrogenation and transfer hydrogenation of simple ketones are described. Reaction of (dm-Phebox-R)H with RuCl3·3(H2O) in the presence of Zn and 1,5-cyclooctadiene
A new NCN pincer ruthenium complex and its catalytic activity for enantioselective hydrogenation of ketones
作者:Jun-ichi Ito、Satoshi Ujiie、Hisao Nishiyama
DOI:10.1039/b800387d
日期:——
New bis(oxazolinyl)phenyl–ruthenium(II) complexes, which were synthesized by C–H bond activation with RuCl3·3H2O in zinc powder and 1,5-cyclooctadine followed by ligand exchange reaction with sodium acetylacetonate or acetylacetone, exhibited enantioselective hydrogenation of ketones in up to 90% ee.