Visible-Light-Mediated Vicinal Difunctionalization of Activated Alkynes with Boronic Acids: Substrate-Controlled Rapid Access to 3-Alkylated Coumarins and Unsaturated Spirocycles.
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DOI: 10.1021/acs.orglett.2c04333
Abstract: A visible-light-mediated difunctionalization of activated alkynes with boronic acid is unveiled to synthesize 3-alkylated coumarins and unsaturated spiro-lactones. The substituent at the para-position of the aryl ring of aryl alkynoate plays a pivotal role in… read more here.
Keywords: alkynes boronic; alkylated coumarins; visible light; difunctionalization activated ... See more keywords