Enantioselective Synthesis of Dihydropyrazoles by Formal [4+1] Cycloaddition of in Situ-Derived Azoalkenes and Sulfur Ylides
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https://figshare.com/articles/dataset/Enantioselective_Synthesis_of_Dihydropyrazoles_by_Formal_4_1_Cycloaddition_of_in_Situ_Derived_Azoalkenes_and_Sulfur_Ylides/2528026
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资源简介：
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%).
创建时间：
2012-04-25
