A new type of L-Tertiary leucine-derived ligand: Synthesis and application in Cu(II)-catalyzed asymmetric Henry reactions
作者:Zedong Cai、Ting Lan、Pengfei Ma、Jingfang Zhang、Qingqing Yang、Wei He
DOI:10.1016/j.tet.2019.130469
日期:2019.8
of Schiff bases derived from amino acids were developed as chiral ligands for Cu(II)-catalyzed asymmetric Henry reactions. The optimum ligand 7d exhibited outstanding catalytic efficiency in the Cu(II)-catalyzed asymmetric Henry additions of four nitroalkanes to different kinds of aldehydes to produce 76 desired adducts in high yields (up to 96%) with excellent enantioselectivities, up to 99% enantiomeric
开发了一系列新的氨基酸衍生的席夫碱,作为Cu(II)催化的不对称亨利反应的手性配体。最佳配体7d在Cu(II)催化的四种硝基链烷烃向不同种类的醛的不对称亨利加成反应中表现出出色的催化效率,以高收率(高达96%)产生76种所需的加合物,具有出色的对映选择性,对映异构体高达99%超额(ee)。