Transition-Metal-Free Lactonization of sp2 C–H Bonds with CO2
Organic Letters(2017)
Abstract
The transition-metal-free lactonization of heteroaryl and alkenyl C–H bonds with carbon dioxide is reported to synthesize important coumarin derivatives in moderate to excellent yields. These redox-neutral reactions feature a broad substrate scope, good functional group tolerance, facile scalability, and easy product derivatization.
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Key words
bonds,transition-metal-free
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