Recoverable (<i>R</i>)- and (<i>S</i>)-Binap−Ag(I) Complexes for the Enantioselective 1,3-Dipolar Cycloaddition Reaction of Azomethine Ylides
作者:Carmen Nájera、M. de Gracia Retamosa、José M. Sansano
DOI:10.1021/ol701577k
日期:2007.9.1
The first enantioselective 1,3-dipolar cycloaddition reaction of amino acid derived azomethine ylides and maleimides catalyzed by very stable and recyclable chiral (R)- or (S)-binap-AgClO(4) complexes is described. The reactions are performed at room temperature, in good yields, with high endo diastereoselectivity and enantioselectivity, the complex being recovered by simple filtration.