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A new series of mono-N-sulfonamides of C 2 -symmetrical 2′-bipyrrolidine have been designed, synthesized, and successfully applied as the organocatalysts to the enantio- and diastereoselective Michael addition of 4H-thiopyran-4-one to a variety of nitroolefins. Catalyst 10 was identified in the examinations to exhibit more superior catalytic ability than the traditional chiral pyrrolidine...
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