Hindered piperidine derivatives with a new functional group (–S–N=S=S), 2,2,6,6-tetramethyl-1-(thiosulfinylaminothio)piperidines (4) were obtained from the corresponding piperidines 1, sulfur monochloride and ammonia. These compounds were also prepared from bis(2,2,6,6-tetramethylpiperidino) disulfides or bis(2,2,6,6-tetramethylpiperidino) trisulfides under similar reaction conditions. In much lower yields, unhindered 1-(thiosulfinylaminothio)piperidines (8) were also obtained. The photochemical and thermal stabilities of 4 and 8 were nearly the same. Reaction pathways were disucssed.
                                    从相应的
吡啶1、一
氯化硫和
氨可以得到具有新型官能团(–S–N=S=S)的受阻
吡啶衍生物,2,2,6,6-四甲基-1-(亚磺
酰亚胺硫基)
吡啶(4)。在类似的反应条件下,这些化合物也可从二(2,2,6,6-四
甲基吡啶基)二
硫化物或二(2,2,6,6-四
甲基吡啶基)三
硫化物制备。产量低得多时,也得到了非受阻的1-(亚磺
酰亚胺硫基)
吡啶(8)。4和8的光
化学稳定性和热稳定性几乎相同。讨论了反应途径。