Journal of the American Chemical Society, Vol.130, No.51, 17250-17250, 2008
Highly Enantioselective 1,3-Dipolar Cycloaddition of Azomethine Ylides Catalyzed by Copper(I)/TF-BiphamPhos Complexes
A new and highly efficient Cu-I/TF-BiphamPhos catalytic system exhibited excellent reactivity, enantio-/diastereoselectivity, and structural scope in asymmetric 1,3-dipolar cycloaddition of azomethine ylides with 0.1-3 mol % of catalyst loading. The present methodology is the best result for asymmetric cycloaddition of azomethine ylides, especially derived from amino esters other than glycinate in terms of reactivity and enantioselectivity.