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  • Enantioselective Synthesis ...
    Chen, Jia-Rong; Dong, Wan-Rong; Candy, Mathieu; Pan, Fang-Fang; Jörres, Manuel; Bolm, Carsten

    Journal of the American Chemical Society, 04/2012, Letnik: 134, Številka: 16
    Journal Article

    An unprecedented strategy to access highly enantioenriched dihydropyrazoles is described. It involves formal 4+1 cycloadditions of in situ-derived azoalkenes and sulfur ylides catalyzed by a chiral copper/Tol-BINAP complex. A variety of synthetically and biologically important dihydropyrazoles have been obtained with high enantioselectivities (up to 97:3 er) in good yields (83–97%).