Highly Enantioselective Asymmetric 1,3-Dipolar Cycloaddition of Azomethine Ylide Catalyzed by a Copper(I)/ClickFerrophos Complex
作者:Shin-ichi Fukuzawa、Hiroshi Oki
DOI:10.1021/ol8003996
日期:2008.5.1
A copper(I)/ClickFerrophos complex catalyzed the asymmetric 1,3-dipolar cycloaddition reaction of methyl N-benzylideneglycinate (the source of azomethine ylides) with vinyl sulfone to give the exo-2,4,5-trisubstituted pyrrolidine in good yield with high enantioselectivity (99% ee). The complex also effectively catalyzed reactions of other dipolarophiles such as acrylates, maleate, and maleimides to
铜(I)/ ClickFerrophos络合物催化N-亚苄基甘氨酸甲酯(偶氮甲亚胺基化物的来源)与乙烯基砜的不对称1,3-偶极环加成反应,以高收率得到exo-2,4,5-三取代的吡咯烷,高对映选择性(99%ee)。该配合物还有效地催化其他双亲性试剂如丙烯酸酯,马来酸酯和马来酰亚胺的反应,得到具有高非对映和对映选择性的exo-2,4,5-和2,3,4,5-取代的吡咯烷衍生物。