The following polyalkylbenzenes bearing bulky groups have been subjected to direct iodination using iodine and periodic acid, and the corresponding mono-iodinated products have been obtained in fairly high yields: 4-t-butyl-1, 2-dimethylbenzene, 5-t-butyl-1, 3-dimethylbenzene, 5-t-butyl-1, 2, 3-trimethylbenzene, 1, 2, 4, 5-tetraisopropylbenzene and p-di-t-butylbenzene. The polyiodination of polymethylbenzenes has also proceeded smoothly, giving polyiodo compounds in high yields. A comparison of various direct methods has proved the above reagent to be the best iodinating agent for a variety of polyalkylbenzenes.
以下带有庞大基团的多元烷基苯,在直接
碘化反应中使用了
碘和
过碘酸,得到了较高产率的单
碘化产物:4-叔丁基-1,2-二甲基苯、5-叔丁基-1,3-二甲基苯、5-叔丁基-1,2,3-三甲基苯、1,2,4,5-四异丙基苯和p-二
叔丁基苯。多元甲基苯的多
碘化反应也顺利进行,得到了高产率的多
碘化合物。比较多种直接方法后发现,上述试剂是多种多元烷基苯最好的
碘化试剂。