12 reacted with 4-toluenesulfonyl chloride in boiling dichloromethane solution to give the chlorinated product 13 rather than the expected tosylate 3 by a mechanism that could involve neighbouring group participation of the nitro-substituent. In contrast, the isomeric alcohol 15 reacted normally with 4-toluenesulfonyl chloride giving the tosylate 16 under similar conditions.
醇12与4-甲
苯磺酰氯在沸腾的
二氯甲烷溶液中反应,从而通过可能涉及硝基取代基的相邻基团参与的机理而得到
氯化产物13,而不是预期的
甲苯磺酸酯3。相反,异构醇15在相似条件下通常与4-甲
苯磺酰氯反应得到
甲苯磺酸酯16。