Three-component reactions based on trapping ammonium ylides with N-sulfonyl aldimines via cooperative catalysis of squaramides and Rh2(OAc)4
2014
Abstract Three-component reactions of aryl diazoacetates, arylamines and N -sulfonyl aldimines cooperatively catalyzed by squaramides and dirhodium acetate are reported to afford N -sulfonyl α,β-diamino acid derivatives in moderate to good yields and diastereoselectivity.
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