Tridentate ligands derived from L-tert-Leucine for the Cu(II) mediated asymmetric Henry reaction
作者:NESLİHAN KORKMAZ、DEMET ASTLEY、STEPHEN THOMAS ASTLEY
DOI:10.3906/kim-1009-15
日期:——
Chiral tridentate Schiff base ligands were prepared from L-tert-Leucine and used as catalysts in the asymmetric Henry reaction in the presence of Cu(II) ions. Moderate enantiomeric excesses (up to 66%) and yields (up to 76%) of the desired \beta-nitroalcohols were obtained.
Enantioselective Henry reaction catalyzed by a novel L-(+)-aspartic acid-derived Schiff base ligand and Cu(II) ion
作者:GAMZE KOZ、DEMET ASTLEY、STEPHEN THOMAS ASTLEY
DOI:10.3906/kim-1103-19
日期:——
Mild and efficient enantioselective Henry reactions of nitromethane with various aldehydes were catalyzed by a novel L-(+)-aspartic acid-derived Schiff base ligand in the presence of Cu(II) ions, affording the corresponding adducts in high yields (up to 96%) and enantioselectivities (up to 92% ee).