22276-95-5
5-溴-4-氯-7H-吡咯并[2,3-d]嘧啶
+
541-41-3
氯甲酸乙酯
→
~76%
144927-57-1
4-氯-7H-吡咯并[2,3-d]嘧啶-5-甲酸乙酯
3680-69-1
4-氯吡咯并嘧啶