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A Mn(I)‐catalyzed chelation‐assisted direct C6−H alkenylation of 2‐pyridones with both terminal and internal alkynes in a highly regio‐ and stereo‐selective manner has been developed. The catalytic system consisting of Mn(CO)5Br catalyst and KOAc additive allows 1‐(2‐pyridyl)‐2‐pyridones to undergo alkenylation with various terminal alkynes in methyl tert‐butyl ether (MTBE) to furnish the C6‐alkenylated...
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