A Rh-catalyzed annulation of aryl thiocarbamates with internal alkynes via C-H bond activation has been developed. This protocol provides a new route to 3,4-disubstituted coumarins.
Yingwei Zhao, Feng Han, Lei Yang, Chungu Xia. Access to coumarins by rhodium-catalyzed oxidative annulation of aryl thiocarbamates with internal alkynes. Organic letters. 2015 Mar 20;17(6):1477-80
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PMID: 25760673
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