It was found that sodium salt of 1,2-benzisothiazole-3(2H)-thione 1,1-dioxide (thiosaccharin) readily reacted with alkyl halide affording 3-(alkylthio)-1,2-benzisothiazole 1,1-dioxide (3). Treatment of 3 with piperidine produces the corresponding alkanethiol in situ quantitatively and subsequent treatment with various electrophiles gives the corresponding sulfides and thiocarboxylic S-esters in good yields.
发现1,2-
苯并
异噻唑-3(2H)-
硫酮1,1-二
氧化物(
硫糖精)的
钠盐与烷基卤化合物容易反应,生成3-(烷
硫基)-1,2-
苯并
异噻唑1,1-二
氧化物(3)。将3与
哌啶反应,现场定量地生成相应的烷
硫醇,随后与各种亲电试剂反应,能够以良好产率得到相应的
硫化物和
硫代
羧酸S-
酯。