Regio- and Stereoselective Generation of Alkenylindium Compounds from Indium Tribromide, Alkynes, and Ketene Silyl Acetals

InBr₃ promotes the addition of ketene silyl acetals to monosubstituted alkynes to afford 2,2-disubstituted alkenylindium compounds in high regio- and stereoselectivity (see scheme). In addition, the alkenylindium derivatives have been subsequently coupled with iodobenzene in the presence of a palladium catalyst.