Vicarious NucleophilicSubstitution of Hydrogen in Nitroarenes with in situ Generated Carbanionsof 1-Methyl-3-chloro-1,3-dihydro-2,1-benzisothiazole 2,2-Dioxides
作者:Krzysztof Wojciechowski、Helena Modrzejewska
DOI:10.1055/s-2003-40530
日期:——
Base-induced transformation of an equimolar mixture of 1-alkyl-1,3-dihydro-2,1-benzisothiazole 2,2-dioxides (benzosultams) and their 3,3-dichloro derivatives furnishes 1-alkyl-3-chloro-1,3-dihydro-2,1-benzisothiazole 2,2-dioxides which react with nitroarenes according to the vicarious nucleophilic substiution of hydrogen (VNS) mechanism giving 3-(nitroaryl)benzosultams.
在碱诱导下,1-烷基-1,3-二氢-2,1-苯并异噻唑 2,2-二氧化物(苯并舒坦)及其 3,3-二氯衍生物的等摩尔混合物发生转化,生成 1-烷基-3-氯-1,3-二氢-2,1-苯并异噻唑 2,2-二氧化物,并与硝基烯烃根据氢的替代亲核取代(VNS)机理发生反应,生成 3-(硝基芳基)苯并舒坦。