phenylsulphonyl group. In the case of the reaction of 2 with aliphatic amines both the possible TSPs (tele-substitution of the phenylsulphonyl or of the nitro group) were isolated in 9:1 relative yield. All the data show that the phenylsulphonyl is a leaving group far better than the nitro in such tele-substitution processes. The mechanism previously proposed to account for the formation of TSPs from 1,4-dimethyl
1,4 -二甲基- 2 -硝基- 3 - phenylsulphonylnaphthalene(2)反应在120℃在
DMSO benzenethiolate
钠,得到1 -甲基- 2 -硝基- 4 - phenylthiomethylnaphthalene(4)[远摄3'-取代产物(T
SP)的苯基磺酰基]和1,4-二甲基-3-苯基磺酰基-2-苯基
硫代
萘(5)[硝基的正常取代产物(N
SP)]。2与2,4,6-三甲基
苯硫醇钠的类似反应和2,3-双苯基磺酰基-
1,4-二甲基萘(3)与
苯硫醇钠或脂肪族胺的类似反应仅产生苯基磺酰基的T
SP。在2的反应的情况下与脂族胺二者的可能的T
SP(远程的苯基磺酰基的硝基或3'-取代)的9中分离:1个的相对产率。所有数据表明,在这样的远程取代过程中,苯磺酰基是离去基团,远好于硝基。先前提出的解释由1,4-二甲基-
2,3-二硝基萘形成T
SP的机理得到了所得结果的有力支持。