A concise and effective approach to dicarboxamide functionalized novel pyrazolo[1,5‐a]pyrimidine has been developed. The method involves [3 + 3] hetroaromatization of oxoketene dithioacetals (16a–x) with 5‐amino‐N‐cyclohexyl‐3‐(methylthio)‐1H‐pyrazole‐4‐carboxamide (12) in the presence of K2CO3. This method has advantages of excellent yields, operational simplicity, and avoidance of hazardous base
已经开发出一种简洁有效的方法将二甲酰胺官能化的新型
吡唑并[1,5- a ]
嘧啶。该方法涉及在存在K 2 CO的情况下,用5-
氨基-N-环己基-3-(甲
硫基)-1H-
吡唑-4-羧酰胺[ 12 +3]氧化氧杂环丁二
硫缩醛(16a–x)的芳香化。3。该方法的优点是产率高,操作简单并且避免了诸如
哌啶的有害碱。