The synthesis of N-tert-butylamides using SO42−/CexZr1−xO2 catalysts under solvent-free conditions is reported. The methodology has several advantages such as reusability of the catalyst, solvent-free conditions, easy workup, and comparable yield of N-tert-butylamides. A variety of aliphatic, aromatic, and acid-sensitive substrates give high to moderate yields of the corresponding N-tert-butylamides. Surface acidities of the catalysts were correlated with the results obtained. To the best of our knowledge, this is the first report of a modified Ritter reaction on SO42−/CexZr1−xO2 using tert-butyl acetate as carbocationic source.
报道了在无溶剂条件下,利用SO42−/CexZr1−xO2催化剂合成N-叔丁基酰胺的方法。该方法具有多个优点,如催化剂可重复使用、无溶剂条件、简单的后处理过程,以及比较相似的N-叔丁基酰胺的产率。多种脂肪族、芳香族及酸敏感底物均能获得高至中等的相应N-叔丁基酰胺的产率。催化剂的表面酸度与所得结果相关联。据我们所知,这是首次报道在SO42−/CexZr1−xO2催化下,使用
叔丁醇乙酸酯作为正电荷源进行改进型Ritter反应。