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Song, Zhi-Jie; Bao, Yu; Sun, Yun-Jia; Yan, Shenghu; Zhang, Yue; Li, Guigen; Wang, Jia-Yin
Journal of organic chemistry, 04/2024, Letnik: 89, Številka: 7Journal Article
General and convenient visible-light-promoted alkylsulfonylation and cyanoalkylsulfonylation of MBH adducts have been developed through the multicomponent insertion of sulfur dioxide, enabling the assembly of two C–S bonds to generate structurally diverse allylic alkylsulfones (43 examples in total). The reaction of MBH adducts with potassium alkyltrifluoroborates and 1,4-diazabicyclo2.2.2octane bis(sulfur dioxide) adduct afforded sulfones with generally good yields. Notably, the addition of N,N,N′,N′-tetramethylethylenediamine as a base into the photocatalytic system led to yielding an alkyl sulfonyl unit and cyano group-anchored trisubstituted alkenes by utilizing cycloketone oxime esters as C-radical precursors. Both of these reactions have constructed two C–S bonds, and all desired products were obtained in moderate to excellent yields with complete stereospecificity.
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