Dipeptide‐Derived Multifunctional Quaternary Phosphonium Salt Catalyzed Asymmetric Cyclizations via a Tandem Michael Addition/SN2 Sequence

作者: Dongdong Cao , Jiaxing Zhang , Hongyu Wang , Gang Zhao , None

DOI: 10.1002/CHEM.201501806

关键词: TandemDipeptideChemistryPhosphoniumOrganic chemistrySN2 reactionMichael reactionPhosphonium saltOrganocatalysisIntramolecular force

摘要: A novel family of dipeptide-based multifunctional quaternary phosphonium salts has been developed as chiral phase-transfer catalysts, which feature ready accessibility and structure modularity, allowing easy fine-tunings activity. They demonstrated high efficiency in catalyzing the tandem asymmetric Michael addition/intramolecular SN 2 reaction between 6 or 7-substituted conjugate enones malonates, providing synthetically important five six-membered carbocycles heterocycles good yields with to excellent enantioselectivities.

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