C2 symmetrical nickel complexes derived from α-amino amides as efficient catalysts for the enantioselective addition of dialkylzinc reagents to aldehydes
作者:Jorge Escorihuela、Belen Altava、M. Isabel Burguete、Santiago V. Luis
DOI:10.1016/j.tet.2012.11.025
日期:2013.1
amides were studied for the enantioselectiveaddition of dialkylzincreagents to aldehydes. Different structural elements on the ligands seem to play an important role in determining the observed enantioselectivity. Through optimization of structure and reaction conditions, the best ligand provided secondary alcohols in excellent yields (up to 98%) and enantioselectivity of up to 99% ee for (R)-enantiomer