Enantioselective synthesis of amines by combining photoredox and enzymatic catalysis in a cyclic reaction network.
Enantioselective synthesis of amines by combining photoredox and enzymatic catalysis in a cyclic reaction network.
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通过在环状反应网络中结合光毒素和酶促催化,对胺的映选择性合成。
DOI:
10.1039/c8sc01561a
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发表时间:
2018-06-14
期刊:
影响因子:
8.4
通讯作者:
Wenger OS
中科院分区:
文献类型:
--
作者:
Guo X;Okamoto Y;Schreier MR;Ward TR;Wenger OS
The combination of photoredox and enzymatic catalysis in a cyclic reaction network enables enantioselectivity control in photochemical processes. Visible light-driven reduction of imines to enantioenriched amines in aqueous solution is demonstrated for the first time. Excitation of a new water-soluble variant of the widely used [Ir(ppy)3] (ppy = 2-phenylpyridine) photosensitizer in the presence of a cyclic imine affords a highly reactive α-amino alkyl radical that is intercepted by hydrogen atom transfer (HAT) from ascorbate or thiol donors to afford the corresponding amine. The enzyme monoamine oxidase (MAO-N-9) selectively catalyzes the oxidation of one of the enantiomers to the corresponding imine. Upon combining the photoredox and biocatalytic processes under continuous photo-irradiation, enantioenriched amines are obtained in excellent yields. To the best of our knowledge, this is the first demonstration of a concurrent photoredox- and enzymatic catalysis leading to a light-driven asymmetric synthesis of amines.
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