5 years ago

Metal-Free, Visible-Light-Promoted Synthesis of 3-Phosphorylated Coumarins via Radical C−P/C−C Bond Formation

Metal-Free, Visible-Light-Promoted Synthesis of 3-Phosphorylated Coumarins via Radical C−P/C−C Bond Formation
Dan Liu, Peng-Fei Xu, Xing-Zhi Wang, Jian-Qiang Chen
A metal-free, visible-light-promoted direct difunctionalization of alkynoates was achieved under mild conditions. By employing catalytic quantities of the commercially available Eosin Y (EY) as the photocatalyst and tert-butyl-hydroperoxide (TBHP) as the oxidant, we developed a radical tandem phosphorylation/cyclization reaction to synthesize various 3-phosphorylated coumarins with high functional group tolerance, moderate to good yields, and excellent regioselectivities.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/adsc.201700293

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