Treatment of triphenylbismuth difluoride with alkynyldiisopropoxyboranes in the presence of BF3·OEt2 in CH2Cl2 gives alkynyltriphenylbismuthonium tetrafluoroborates, which react with sodium p-toluenesulfinate in dual reaction modes depending on the solvents employed.
First synthesis of alkynyltriphenylbismuthonium salts and their dual reaction modes in sulfonylation
Y. Matano, Chem. Commun., 2000, 2233 DOI: 10.1039/B006881K
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