Aryl methanesulfonates 3 (18 examples) were easily prepared by thermal decomposition of dry arenediazonium o-benzene-disulfonimides 1 in methanesulfonic acid (2). The reactions were carried out at temperatures between 60 and 120 °C for times between 0.5 and 8 h. The aryl methanesulfonates were obtained in reproducible yield of 70-90%, with few exceptions. In all cases the o-benzenedisulfonimide (4) could be recovered in good yields which can then be reused to prepare the salts 1. When thermal decomposition of salts 1 was carried out in trifluoromethanesulfonic acid (5) at 90-120 °C for 1-2 h, aryl trifluoromethanesulfonates 6 were obtained in 73-78% yield (3 examples).
芳基
甲磺酸酯3(共18个实例)通过在
甲磺酸(2)中热分解干燥的
芳烃重氮 o-苯并二磺
酰亚胺(1)而容易制备。反应温度在60至120°C之间,时间在0.5至8小时之间。芳基
甲磺酸酯的可重复产率为70-90%,偶有例外。在所有情况下,o-苯并二磺
酰亚胺(4)均可在良好收率下回收,随后可再用于制备盐1。当在90-120°C下于
三氟甲磺酸(5)中对盐1进行热分解1-2小时后,得到芳基
三氟甲磺酸酯6,收率为73-78%(共3个实例)。