Iodination of various aromatic amines proceeds smoothly with a preformed homogeneous mixture of hydroiodic acid potassium permanganate in acetonitrile. para‐Substituted products were obtained in high yields (71‐78%) within twelve hours at room temperature. With a slight modification of the permanganate, hydroiodic acid and substrate ratio, iodination of alkynes to vic‐diiodoalkenes can be carried out at 60 °C in 65‐87% yield.
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Chen et al. (1996) studied this question.
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