Regioselective Piperidine-Catalyzed Tandem Imination–Isocyanate Annulation to Fused Tricyclic Triazines
作者:Indrajeet J. Barve、Chih-Hau Chen、Chih-Hsien Kao、Chung-Ming Sun
DOI:10.1021/co400159z
日期:2014.5.12
isocyanates to give highly functionalized benzimidazole-embedded triazines. The second-stage transformation revealed that the formation of triazinone functionality is entirely regioselective to allow rapid assembly of biologically interesting tricyclic skeletons. In conjunction with the application of microwave irradiation and IL support, this method provides an efficient route to access substituted benzoimidazotriazines
探索了一种新型的串联氨基异氰酸酯介导的环空反应。离子液体固定化的2-氨基苯并咪唑与醛和异氰酸酯顺序反应,得到高度官能化的苯并咪唑嵌入的三嗪。第二阶段转化表明,三嗪酮官能团的形成是完全区域选择性的,从而可以快速组装生物学上令人感兴趣的三环骨架。结合微波辐射和IL支撑的应用,该方法提供了一种获取取代的苯并咪唑三嗪的有效途径。