Intramolecular Cyclization of Vinyldiazoacetates as a Versatile Route to Substituted Pyrazoles
作者:Ivan Vilotijevic、Denis Drikermann、Valerie Kerndl、Helmar Görls
DOI:10.1055/s-0040-1707111
日期:2020.7
Vinyldiazo compounds undergo a thermal electrocyclization to form pyrazoles in yields of up to 95%. The reactions are operationally simple, use readily available starting materials, require no intervention of a catalyst, and enable the synthesis of mono-, di- and tri-substituted pyrazoles. With the ability to produce highly substituted pyrazoles and the flexibility in installing various types of substituents
乙烯基重氮化合物经过热电环化形成吡唑,产率高达 95%。该反应操作简单,使用容易获得的原料,不需要催化剂的干预,并且能够合成单、二和三取代的吡唑。由于能够生产高度取代的吡唑,并且可以灵活地安装各种类型的取代基,这种方法构成了这种有价值的杂环支架的新入口,可能对化学工业的所有分支感兴趣。