In the present study,we described a continuous-flow,one-pot synthesis of asymmetrical ureas using nucleophilic addition reaction of amines to isocyanates derived from acids’Curtius rearrangement.The advantages of thi...In the present study,we described a continuous-flow,one-pot synthesis of asymmetrical ureas using nucleophilic addition reaction of amines to isocyanates derived from acids’Curtius rearrangement.The advantages of this method included broad substrate scope,high yields,rapid reaction,simplicity,extraordinary safety,and easy scale-up.展开更多
以芳杂环取代酸为原料,用Curtius重排的方法合成异氰酸酯,直接与2-萘氧乙酰肼作用,一锅法合成了4种1-(2-萘氧乙酰基)-4-取代芳杂环氨基脲类化合物.该方法具有原料易得、操作简便、无需分离中间体等优点.目标产物的结构经元素分析、IR及1...以芳杂环取代酸为原料,用Curtius重排的方法合成异氰酸酯,直接与2-萘氧乙酰肼作用,一锅法合成了4种1-(2-萘氧乙酰基)-4-取代芳杂环氨基脲类化合物.该方法具有原料易得、操作简便、无需分离中间体等优点.目标产物的结构经元素分析、IR及1 H NMR得到了确证.展开更多
基金National Natural Science Foundation of China(Grant No.21877005).
文摘In the present study,we described a continuous-flow,one-pot synthesis of asymmetrical ureas using nucleophilic addition reaction of amines to isocyanates derived from acids’Curtius rearrangement.The advantages of this method included broad substrate scope,high yields,rapid reaction,simplicity,extraordinary safety,and easy scale-up.