[摘要]：Novel cinchona alkaloid-derived bifunctional organocatalysts contg. sulfonamide groups were utilized to promote Michael addn. of bicyclic a-substituted b-ketoesters to nitroolefins. The desired Michael adducts with all-carbon quaternary centers were constructed in high yield and with excellent enantioselectivity, demonstrating the great potential of cinchona alkaloid-derived sulfonamides in asym. catalysis.
