C-H Functionalization of Amines via Alkene-Derived Nucleophiles through Cooperative Action of Chiral and Achiral Lewis Acid Catalysts: Applications in Enantioselective Synthesis.

C-H Functionalization of Amines via Alkene-Derived Nucleophiles through Cooperative Action of Chiral and Achiral Lewis Acid Catalysts: Applications in Enantioselective Synthesis.
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DOI:
10.1021/jacs.8b06699
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发表时间:
2018-08-22
影响因子:
15
通讯作者:
Wasa M
Wasa M
中科院分区:
化学1区
文献类型:
--
作者:
Shang M;Chan JZ;Cao M;Chang Y;Wang Q;Cook B;Torker S;Wasa M

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Catalytic transformations of α-amino C–H bonds to afford valuable enantiomerically enriched α-substituted amines, entities that are prevalent in pharmaceuticals and bioactive natural products, have been developed. Typically, such processes are carried out under oxidative conditions, and require precious metal-based catalysts. Here, we disclose a strategy for enantioselective union of N-alkylamines and α,β-unsaturated compounds, performed under redox-neutral conditions, and promoted through concerted action of seemingly competitive Lewis acids, B(C6F5)3 and a chiral Mg–PyBOX complex. Thus, a wide variety of β-amino carbonyl compounds may be synthesized, with complete atom economy, through stereoselective reaction of an in situ generated enantiomerically enriched Mg-enolate and an appropriate electrophile.
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