Under “solvent-free” solid–solid and solid–vapor conditions, 1-aryl-4-(methylthio)-2-(p-tolylsulfonyl)-1,3-butadienes (1) react with iodine to form (p-tolylsulfonyl)naphthalene derivatives (2) in high yield. These conditions make the reaction tolerant to the kind of the aryl so that various derivatives of 2 were produced in high yield. The products (2) can be obtained in a nearly pure form by removing co-existing hydrogen iodide and dimethyl disulfide by evaporation. Thus, this process is environmentally benign, because no solvent and water need to get the pure product.
在“无溶剂”固-固和固-气条件下,1-芳基-4-(甲
硫基)-2-(对
甲苯磺酰基)-
1,3-丁二烯(1)与
碘反应生成(对
甲苯磺酰基) )
萘衍
生物(2)收率高。这些条件使得反应能够耐受芳基的种类,从而以高产率产生2的各种衍
生物。通过蒸发除去共存的
碘化氢和
二甲基二硫,可以获得几乎纯的产物(2)。因此,该过程对环境无害,因为无需溶剂和
水即可获得纯净的产品。