作者:Estela Haldón、Eleuterio Álvarez、M. Carmen Nicasio、Pedro J. Pérez
DOI:10.1039/c4cc03614j
日期:——
Electron deficient azides are challenging substrates in CuAAC reactions. Particularly, when N-carbonyl azides are applied the formation of N-carbonyl triazoles has not yet been observed. We report herein the first example of this class of reaction, with a copper-based system that efficiently enables the synthesis of N-carbamoyl 1,2,3-triazoles by [3+2] cycloaddition of N-carbamoyl azides and alkynes.
缺电子叠氮化物是 CuAAC 反应中具有挑战性的底物。特别地,当应用N-羰基叠氮化物时,尚未观察到N-羰基三唑的形成。我们在此报告了此类反应的第一个例子,使用铜基系统,通过 N-氨基甲酰叠氮化物和炔烃的 [3+2] 环加成,有效地合成 N-氨基甲酰基 1,2,3-三唑。