Visible-light promoted sulfonamidation of enol acetates to α-amino ketones based on redox-neutral photocatalysis

Literature Information

Publication Date 2019-10-02
DOI 10.1039/C9QO01119F
Impact Factor 5.281
Authors

Lin Wang, Pi Cheng, Xinhao Wang, Wei Wang, Jianguo Zeng, Yun Liang, Oliver Reiser


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Abstract

A visible-light mediated photoredox-catalyzed sulfonamidation of enol acetates to α-amino ketones has been developed. Upon irradiation with a blue LED (λ 425 ± 15 nm) in the presence of catalytic amounts of Ir(ppy)3 (2 mol%), N-arylsulfonyl-1-aminopyridine salts were transformed into N-centered radical intermediates, which then underwent coupling with enol acetates to give α-sulfonylamino ketones in up to 83% yield. The process features mild and operationally simple reaction conditions and does not require an external oxidant.

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