A visible-light-induced trifluoromethylalkynylation of 1,6-dialkenes was developed without transition-metal and photocatalyst, allowing the formation of three C-C bonds in a single step. By using a small amount of benzoyl peroxide (BPO) as an initiator, this method enables the activation of alkynyl triflones in a photocatalyst-free manner for the first time to initiate a photocatalytic radical cascade cyclization reaction, showing advantages of high step economy, mild reaction conditions, and broad substrate scope.
A visible-light-induced trifluoromethylalkynylation of 1,6-dialkenes was developed under transition-metal-free and photocatalyst-free conditions, enabling the construction of three C-C bonds in a single preparation step. By employing a catalytic amount of benzoyl peroxide (BPO) as an initiator, this protocol enables easy-to-handle activation of alkynyl triflones under photocatalyst-free conditions for the first time to initiate a photocatalytic radical cascade cyclization reaction, showing obvious advantages of high step-economy, mild reaction conditions, and broad substrate scope.
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