We report a series of efficient procedures to prepare 2-nitrophenyl-4-aryl-1,2,3-triazoles avoiding the isolation of potentially hazardous 2-nitrophenyl azides. An organocatalyzed azide-enolate variant allows efficient access to the target compounds while it was shown that a metal-catalyzed azide-alkyne procedure involving a preliminary Sonogashira coupling was feasible starting from electron-deficient aryl iodides.
我们报告了一系列高效的程序,用于制备2-
硝基苯基-4-芳基-
1,2,3-三唑,避免了分离潜在危险的2-
硝基苯基
叠氮化物。一种有机催化的
叠氮-烯醇变体允许有效地获得目标化合物,同时还表明,从电子不足的芳基
碘化物出发,涉及初步Sonogashira偶联的
金属催化
叠氮-
炔烃程序是可行的。