Catalytic asymmetric construction of spiro pyrrolidines with contiguous quaternary centers via 1,3-dipolar cycloaddition of azomethine ylides
作者:Tanglin Liu、Qinghua Li、Zhaolin He、Jiawei Zhang、Chunjiang Wang
DOI:10.1016/s1872-2067(14)60204-7
日期:2015.1
high functionality and up to three contiguous all-carbon quaternary stereogenic centers were synthesized by Cu(I)-catalyzed asymmetric endo-selective 1,3-dipolarcycloaddition of azomethineylides with cyclopropylidene acetates. This synthesis system performs well for a broad scope of substrates. α-unsubstituted/α-substituted azomethineylides and cyclopropylidene acetates are compatible 1,3-dipoles