2,3-Dihydro-3-oxo-2-phenyliodonium-benzo[b]thiolenide-1,1-dioxide: Synthesis, decomposition and Cu-catalyzed thermal reactions.

Article abstract of DOI:10.1016/S0040-4020(97)00589-9

Iodonium ylide 4 was prepared in 93% yield from the reaction of β-ketosulfone 3 with phenyl iodosyl bis(trifluoroacetate). Although insoluble in most solvents, ylide 4 was readily soluble in a mixture of CH₂Cl₂ ! ethanol (1:1), yield