7-氯吡唑并[1,5-a]嘧啶-5-胺 、
7-chloro-2-methylpyrazolo[1,5-a]pyrimidin-5-amine 、
7-chloro-2-ethylpyrazolo[1,5-a]pyrimidin-5-amine 、 7-chloro-2-cyclopropylpyrazolo[1,5-a]pyrimidin-5-amine 、 Terephthalic acid monomethylester chloride 在
碳酸氢钠 、
吡啶 、
水 、
氮气 作用下,
以
吡啶 为溶剂,
反应 33.5h,
以the crude product methyl 4-(7-chloropyrazolo[1,5-a]pyrimidin-5-ylcarbamoyl)benzoate 2C (92%), methyl 4-(7-chloro-2-methylpyrazolo[1,5-a]pyrimidin-5-ylcarbamoyl)benzoate 2E (72%), methyl 4-(7-chloro-2-ethylpyrazolo[1,5-a]pyrimidin-5-ylcarbamoyl)benzoate 2G (84%) or methyl 4-(7-chloro-2-cyclopropylpyrazolo[1,5-a]pyrimidin-5-ylcarbamoyl)benzoate 2I (98%) was obtained as an orange solid的产率得到