tert-butyl 8-{4-[(6-ethoxy-6-oxohexyl)oxy]phenoxy}-1-methyl-4,5-dihydro-1H-thieno[3,4-g]indazole-6-carboxylate 、
盐酸 、
四氢呋喃 在
乙酸乙酯 、
正己烷 、
8-{4-[(5-carboxypentyl)oxy]phenoxy}-1-methyl-4,5-dihydro-1H-thieno[3,4-g]indazole-6-carboxylic acid 作用下,
以
乙醇 为溶剂,
反应 6.0h,
以to give a mixture (1.95 g) of 8-{4-[(6-ethoxy-6-oxohexyl)oxy]phenoxy}-1-methyl-4,5-dihydro-1H-thieno[3,4-g]indazole-6-carboxylic acid and 8-{4-[(5-carboxypentyl)oxy]phenoxy}-1-methyl-4,5-dihydro-1H-thieno[3,4-g]indazole-6-carboxylic acid的产率得到8-{4-[(6-ethoxy-6-oxohexyl)oxy]phenoxy}-1-methyl-4,5-dihydro-1H-thieno[3,4-g]indazole-6-carboxylic acid