The asymmetric Michael addition of aldehydes to nitroolefins was investigated using a combination of L-prolinamide derivatives and various acidic additives. (S)-1,1'-Bi-2-naphthol was found to be the most effective co-catalyst and afforded the nitroaldehyde products with excellent yields (up to 95%), enantiomeric excesses (up to 99%) and diastereoselectivity ratios (up to 99:1). (C) 2012 Elsevier Ltd. All rights reserved.
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Chinese Acad Sci, Shanghai Inst Organ Chem, CAS Key Lab Synthet Chem Nat Subst, Shanghai 200032, Peoples R ChinaChinese Acad Sci, Shanghai Inst Organ Chem, CAS Key Lab Synthet Chem Nat Subst, Shanghai 200032, Peoples R China
Li, Fei
Li, Ying-Zi
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Li, Ying-Zi
Jia, Zhen-Shan
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Jia, Zhen-Shan
Xu, Ming-Hua
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Tian, Ping
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Lin, Guo-Qiang
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