Diazirines as Potent Electrophilic Nitrogen Sources: Application to the Synthesis of Pyrazoles
作者:Yoann Schneider、Julie Prévost、Maëlle Gobin、Claude Y. Legault
DOI:10.1021/ol403495e
日期:2014.1.17
Even after more than 50 years since its discovery, the electrophilic potential of diazirines was never truly exploited. This longstanding limitation has been resolved. N-Monosubstituted diaziridines and hydrazones are obtained by nucleophilic additions. They release, under hydrolysis conditions, the corresponding monosubstituted hydrazines. The latter were converted to pyrazoles in high yields. The
自发现以来,即使超过50年,对二嗪的亲电势也从未得到真正的开发。这个长期存在的局限性已得到解决。通过亲核加成获得N-单取代的二氮丙啶和obtained。它们在水解条件下释放相应的单取代的肼。后者以高收率转化为吡唑。可以以80-100%的产率回收金刚烷酮。这项工作证明了重氮作为具有可回收保护基团的亲电子氮源的潜力。