Abstract
Hydroiodination of 2-propynamides leading stereoselectively to (Z)-iodopropenamides was achieved under mild conditions at room temperature by the combined use of zinc iodide and tertbutyl iodide. Similarly, the use of zinc bromide in the presence of tert-butyl bromide enabled the synthesis of (Z)-bromopropenamides. (Z)-Halopropenoic esters were also prepared in high yields.
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