Ag/ThioClickFerrophos catalyzed highly enantioselective 1,3-dipolar cycloaddition of azomethine ylides with alkenes
作者:Kenta Shimizu、Kenichi Ogata、Shin-ichi Fukuzawa
DOI:10.1016/j.tetlet.2010.07.085
日期:2010.9
A silver(I)/ThioClickFerrophos complex catalyzed the endo selective asymmetric 1,3-dipolar cycloaddition reaction of methyl N-benzylideneglycinate (the source of azomethine ylides) with α,β-unsaturated esters and maleimides to give the endo-2,4,5- and 2,3,4,5-substituted pyrrolidines in good yields with high enantioselectivities (up to 99% ee). The complex also effectively catalyzed the endo selective
银(I)/ ThioClickFerrophos络合物催化N-亚苄基甘氨酸甲酯(偶氮甲胺基化物的来源)与α,β-不饱和酯和马来酰亚胺的内选择性不对称1,3-偶极环加成反应,得到内基-2,4, 5-和2,3,4,5-取代的吡咯烷具有高收率和高对映选择性(最高99%ee)。该配合物还有效催化了与β-硝基苯乙烯的内选择性反应,从而以高对映选择性得到4-硝基吡咯烷。