作者: Dongdong Cao , Jiaxing Zhang , Hongyu Wang , Gang Zhao , None
关键词: Tandem 、 Dipeptide 、 Chemistry 、 Phosphonium 、 Organic chemistry 、 SN2 reaction 、 Michael reaction 、 Phosphonium salt 、 Organocatalysis 、 Intramolecular 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.