The high content of Cu2+ as well as the unique structures of hierarchical copper silicate in the as-prepared catalysts endowed their outstanding catalytic performance. Efficient decarboxylative A3-coupling of α-keto acid, amine and alkyne was realized with the low Fe3O4@CuSiO3 loading. A range of propargylamines were produced in good to excellent yields under solvent-free condition. Moreover, the catalyst
摘要通过磁诱导斯托伯法并随后在碱性条件下与
铜离子发生
水热反应,成功制备了高活性和稳定的磁性
铜催化剂。所制备的催化剂中高含量的Cu 2+以及分层的
硅酸铜独特的结构使其具有出色的催化性能。在低
Fe3O4 @ CuSiO3负载下,实现了α-
酮酸,胺和
炔烃的高效脱羧A3偶联。在无溶剂条件下,可以生产出各种
炔丙基胺,收率好至极好。而且,可以容易地用外部磁体将催化剂与最终的有机产物分离。同样,这种催化剂可以循环使用六次,同时保持其活性。