Trapping of Isocyanates with Benzotriazole in situ - Preparation of Carbamoyl Benzotriazoles as an Isocyanate Alternative via Curtius Rearrangement
作者:Xiaoxia Wang、Zhiyun Zhong、Lichun Kong、Xiangming Zhu
DOI:10.1055/s-0029-1217820
日期:2009.9
N-Aryl and N-alkenyl carbamoyl benzotriazoles were prepared in good to excellent yields from acyl azides and benzotri-azole via Curtius rearrangement, while N-alkylcarbamoyl benzotriazoles were formed from N-alkanoyl benzotriazoles and sodium azide in one pot. The carbamoyl benzotriazoles can be used as a stable isocyanate alternative, as has been demonstrated by its reaction with amines to synthesize
N-芳基和N-烯基氨基甲酰基苯并三唑通过Curtius重排从酰基叠氮化物和苯并三唑以良好到优异的产率制备,而N-烷基氨基甲酰基苯并三唑由N-烷酰基苯并三唑和叠氮化钠在一锅中形成。氨基甲酰基苯并三唑可用作稳定的异氰酸酯替代物,正如其与胺反应以优异的产率合成脲所证明的那样。