H2O2‐Promoted Alkoxyalkylation of Terminal Alkynes Employing Two Strategies with Transition‐Metal‐Free Conditions

Abstract H 2 O 2 ‐promoted alkoxyalkylation of terminal alkynes by employing two strategies were developed, this is the first example of the direct C(sp 3 )−H functionalization of ethers to prepare 2‐vinyl heterocycles by using H 2 O 2 as the radical initiator and oxidant. Particularly, this transformation could be conducted without expensive photocatalysts or transition metal catalysts under mild conditions.