%0 Journal Article
%A Luna Costales, Amparo
%A Herrera García, Fernando
%A Almendros Requena, Pedro
%T Visible-light-mediated Ru-catalyzed synthesis of 3-(arylsulfonyl)but-3-enals via coupling of α-allenols with diazonium salts and sulfur dioxide
%D 2020
%@ 1523-7060
%U https://hdl.handle.net/20.500.14352/113575
%X The first coupling of α-allenols, sulfur dioxide, and arenediazonium salts is presented. The three-component reaction which is promoted by visible light can be easily accomplished using DABSO as a sulfur dioxide surrogate in the presence of a photoredox catalyst. In this manner, a broad range of electron-rich and electron-deficient aryl substituents are well accommodated in the sulfonylation–rearrangement cascade to afford the 2,2-disubstituted 3-(arylsulfonyl)but-3-enals in reasonable yields. Based on control experiments, a radical mechanism which does imply 1,2-aryl migration has been proposed.
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