4-{2-propoxy-5-[bis(2-acetoxyethyl)amidosulfonyl]benzoylamino}-1-methyl-3-propylpyrazolo-5-carboxamine 在
potassium tert-butylate 作用下,
以
叔丁醇 为溶剂,
反应 10.5h,
以76%的产率得到1-methyl-5-{2-propyloxy-5-[bis(2-acetoxyethyl)amidosulfonyl]phenyl}-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one