作者:Claudia Feberero、Samuel Suárez-Pantiga、Zaida Cabello、Roberto Sanz
DOI:10.1021/acs.orglett.8b00782
日期:2018.4.20
The reaction of o-lithiated O-aryl N,N-diethylcarbamates with (hetero)aromatic nitriles gives rise to functionalized salicylidene urea derivatives in high yields through a new 1,5-O → N carbamoyl migration. This Snieckus–Fries-type rearrangement nicely complements previously known O → C and O → O related shifts. In addition, when dimethylmalononitrile is used as the electrophilic partner, the carbamoyl
的反应ö -lithiated ø -芳基N,N- -diethylcarbamates与(杂)芳族腈通过一个新的1,5- O→Ñ氨基甲酰基迁移引起高收率官能亚水杨脲衍生物。这种Snieckus–Fries类型的重排很好地补充了先前已知的O→C和O→O相关的移位。另外,当使用二甲基丙二腈作为亲电子伴侣时,相对于预期的硝化反应,氨基甲酰基转移是优选的。