Synthesis of Amidoalkyl Imidazol-2-ylidene Ligands and Their Application to Enantioselective Copper-Catalysed Conjugate Addition
作者:Neil Williams、Theo Moore、Mahboub Merzouk
DOI:10.1055/s-2007-1000832
日期:2008.1
imidazol-2-ylidene ligand was synthesised via a two-step procedure starting from commercially available amino alcohols. Preliminary screening of these bidentate ligands for the enantioselective copper-catalysed conjugateaddition of diethyl zinc to cyclohexenone revealed some moderate ee values. Related chiral iminoalkyl imidazole-2-ylidene ligands demonstrated much poorer enantioselectivity. The results