A novel protocol for the synthesis of 3-nitro-N-aryl/alkylthiophen-2-amines in good yields from the reaction of α-nitroketene N,S-aryl/alkylaminoacetals and 1,4-dithiane-2,5-diol in the presence of K2CO3 in refluxing ethanol is described. This transformation generates two C–C bonds in a single operation and presumably proceeds through a reaction sequence comprising 2-mercaptoacetaldehyde generation, nucleophilic carbonyl addition, annelation and elimination steps.
一种新的合成3-硝基-N-芳基/烷基噻吩-2-胺的协议,从α-硝基酮N,S-芳基/烷基氨基乙醛和1,4-二硫代-2,5-二醇与K2CO3存在下在回流乙醇中反应中获得良好产率。这种转化在单次操作中生成两个C-C键,可能通过包含2-巯基乙醛生成、亲核羰基加成、环合和消除步骤的反应序列进行。