1-trichloromethanesulfenamides yield the corresponding sulfur N,N′-diaryldiimides via a multi-step reaction, whereas the less crowded 2-methylphenyl and 4-methylphenyl derivatives undergo a regioselective ‘head-to-head’ dimerization leading to 5,5,6,6-tetrachloro-1,4,2,3-dithiadiazinanes in high yields. An identical reaction course is observed in the case of the 4-methoxy- and 4-bromoaniline derivatives. A diradical
摘要 N-Aryl-1,1,1-trichloromethanesulfenamides ArNH-SCCl3 在
乙醇溶液中用
氢氧化钾处理后很容易发生脱
氯化氢。由此形成的中间体
硫代羰基S-
酰亚胺根据N-芳基的类型而表现不同。空间拥挤的 N-(2,6-二甲基苯基)-和-N-(2,4,6-三甲基苯基)-1,1,1-三
氯甲亚磺酰胺通过多步反应生成相应的
硫 N,N'-二芳基二
亚胺,而不太拥挤的 2-甲基苯基和 4-甲基苯基衍
生物经过区域选择性的“头对头”二聚化,导致高产率的 5,5,6,6-四
氯-1,4,2,3-二噻二嗪。在4-甲氧基-和
4-溴苯胺衍
生物的情况下观察到相同的反应过程。假设有一种双自由基机制来解释“头对头”二聚化途径。