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JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 134, 期 25, 页码 10389-10392出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja304095z
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Metal-free chiral phosphoric acids and chiral calcium phosphates both catalyze highly enantio- and diastereoselective electrophilic alpha-bromination of enecarbamates to provide an atom-economical synthesis of enantioenriched vicinal haloamines. Either enantiomer can be formed in good yield with excellent diastereo- and enantioselectivity simply by switching the catalyst from a phosphoric acid to its calcium salt.
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