Copper(I) Zeolites as Heterogeneous and Ligand-Free Catalysts: [3+2] Cycloaddition of Azomethine Imines
作者:Murielle Keller、Abdelkarim Sani Souna Sido、Patrick Pale、Jean Sommer
DOI:10.1002/chem.200802191
日期:2009.3.9
Clicking in zeolites: Copper(I)‐exchanged zeolites proved to be practical and efficientcatalysts for the cycloaddition of azomethine imines with alkynes, providing a convenient access to N,N‐bicyclic pyrazolidinone derivatives (see scheme). With high regioselectivity, 100 % atom economy, and convenient product isolation, this heterogeneously catalyzed version of the Dorn cycloaddition corresponds