Asymmetric [3+2] Cycloaddition of Azomethine Ylides Catalyzed by Silver(I) Triflate with a Chiral Bipyrrolidine-Derived Phosphine Ligand
作者:Zhen-Jiang Xu、Chi-Ming Che、Xin Gu、Vanessa Lo
DOI:10.1055/s-0032-1316779
日期:——
bipyrrolidine-derived phosphine ligands L1 and L2 were synthesized. The ‘AgOTf + L1’ protocol catalyzes the asymmetric [3+2] cycloaddition of azomethine ylides with alkenes to give highly substituted pyrrolidines in good yields (up to 90%) with moderate to high diastereoselectivities (up to >19:1 dr) and enantioselectivities (up to 76%). Two novel chiral bipyrrolidine-derived phosphine ligands L1 and L2 were synthesized
摘要 合成了两个新颖的手性联吡咯烷衍生的膦配体L1和L2。“ AgOTf + L1 ”方案可催化偶氮甲亚胺与烯烃的不对称[3 + 2]环加成反应,以高收率(高达90%),中等至高非对映选择性(高达> 19:1 dr)提供高度取代的吡咯烷。对映选择性(高达76%)。 合成了两个新颖的手性联吡咯烷衍生的膦配体L1和L2。“ AgOTf + L1 ”方案可催化偶氮甲亚胺与烯烃的不对称[3 + 2]环加成反应,以高收率(高达90%),中等至高非对映选择性(高达> 19:1 dr)提供高度取代的吡咯烷。对映选择性(高达76%)。