Ammonium ylides generated from ammonium salt 1a-e with a base react with derivatives of 3-nitropyridine 2a-c and 2-nitrothiophene (3) to form products of vicarious nucleophilic substitution (VNS) 7, 8, or 9 respectively. The products of VNS 10, 11, or 12 are also produced from the corresponding ammonium salts, a base and 4-chloro-nitrobenzene (4), nitrobenzene (5), or 1-nitronaphthalene (6), respectively. In a few products, an exchange of alkoxy group 7c or substitution of chlorine by alkoxyl 8a,b occured.
来自
铵盐1a-e与碱反应生成的
铵叶立德与
3-硝基
吡啶衍生物2a-c和
2-硝基噻吩(3)反应,分别形成邻位亲核取代(VNS)产物7、8或9。相应
铵盐与碱和4-
氯硝基苯(4)、
硝基苯(5)或1-
硝基萘(6)反应,也分别生成VNS产物10、11或12。在一些产物中,发生了烷氧基团7c的交换或
氯被烷氧基8a,b取代的现象。