1,1-bis(Methylthio)-2-nitroethene in superacids: NMR study and reactivity of the formed hydroxynitrilium ion
作者:Jean-Marie Coustard
DOI:10.1016/0040-4020(95)00669-y
日期:1995.10
At low temperature in superacids TFSA or HF-SbF5, 1,1-bis(methylthio)-2-nitroethene yields a stable dication with hydroxynitrilium and bis(methylthio)carbocationic sites The first site can be trapped in situ with suitable nucleophiles (aromatics, fluoride) Both sites can be trapped when the acidity is destroyed with MeOH or MeSH, to form in fair to good yield the corresponding α-hydroxyiminoorthothioester
在低温下,在TFSA或HF-SbF 5超酸中,1,1-双(甲硫基)-2-硝基乙烯与羟基腈和双(甲硫基)碳酸盐化位点形成稳定的指示。第一个位点可以用合适的亲核试剂原位捕获(芳族化合物,氟化物)当用MeOH或MeSH破坏酸度时,两个位点都可以被捕获,以公平,良好的产率形成相应的α-羟基亚氨基原硫代酯或呋喃烷原酸酯