Abstract
Activation of the CIAC bond in acetylenic hydrocarbons, catalyzed by iodide complexes of platinum(IV), and the subsequent CAC coupling reaction make it possible to synthesize 1,4-diiodo-substituted dienes with high stereo- and regioselectivity. The reaction involves intermediate formation of bis-σ-vinyl platinum(IV) complexes which can be isolated in the pure state. Under similar conditions palladium(II) complexes catalyze iodine addition to acetylene.
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