A novel, one-pot synthesis of 6-aminouracils via in situ generated ureas and cyanoacetylureas in the presence of an ionic liquid catalyst, 1,1,3,3-tetramethylguanidine acetate, is described. The catalyst can be recycled for five consecutive runs without loss of activity. The mechanism for the ring closure of cyanoacetylurea to 6-aminouracil is also discussed.
本文描述了一种新颖的一锅法合成6-
氨基嘧啶-2-酮,方法是通过在
离子液体催化剂1,1,3,3-四甲基尿
嘧啶醋酸盐存在下原位生成的
脲和
氰乙酰
脲。该催化剂可以连续循环使用五次而不失活。文中还讨论了
氰乙酰
脲环的闭合机制至6-
氨基嘧啶-2-酮的过程。