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Intermolecular Dehydrative [4 + 2] Aza-Annulation of N-Arylamides with Alkenes: A Direct and Divergent Entrance to Aza-Heterocycles

Organic Letters(2019)

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摘要
We disclose that following activation with trifluoromethanesulfonyl anhydride, secondary N-arylamides undergo smooth intermolecular dehydrative [4 + 2] aza-annulation with alkenes under mild conditions to give 3,4-dihydroquinolines, amenable to further functionalization. Meanwhile, conditions have been established to allow divergent one pot synthesis of tetrahydroquinolines and quinolines as well as tricyclic analogues from N-arylamides.
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关键词
alkenes,aza-annulation,aza-heterocycles
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