solvent-free conditions in the presence of a catalytic amount of ZnCl2 as a catalyst. The protocol has the advantages of not using toxic phosgene and other hazardous substrates or organic solvents. Increased reaction rate, good yield, and a simple workup procedure are involved.
摘要 在无溶剂条件下,在 80-85°C 预热的热板上加热胺或苯
肼和
尿素/
硫脲,在催化量的 ZnCl2 存在下,对称地合成 N,N'-二取代
脲/
硫脲。催化剂。该协议的优点是不使用有毒
光气和其他有害底物或有机溶剂。涉及更高的反应速率、良好的产率和简单的后处理程序。