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pubmed-article:19072133pubmed:abstractTextNovel cinchona alkaloid-derived bifunctional organocatalysts containing sulfonamide groups were utilized to promote Michael addition of bicyclic alpha-substituted beta-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 asymmetric catalysis.lld:pubmed
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pubmed-article:19072133pubmed:articleTitleAsymmetric Michael addition mediated by novel cinchona alkaloid-derived bifunctional catalysts containing sulfonamides.lld:pubmed
pubmed-article:19072133pubmed:affiliationDepartment of Chemistry, National University of Singapore, 3 Science Drive 3, Republic of Singapore, 117543.lld:pubmed
pubmed-article:19072133pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:19072133pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed