Methyl 2-ethyl-3-[[2'-(2,5-dihydro-5-oxo-1,2,4-oxadiazol-3-yl)biphenyl-4-yl]methyl]-7-methylimidazo[4,5-b]pyridine-5carboxylate 、 、
sodium hydroxide 、
盐酸 在
乙酸乙酯 、
甲醇 作用下,
以
甲醇 为溶剂,
反应 3.0h,
以methanol afforded the title compound as colorless crystals (0.61 g, 69%), m.p.261°-164° C. (decomp.)的产率得到2-Ethyl-3-[[2'-(2,5-dihydro-5-oxo-1,2,4-oxadiazol-3-yl)biphenyl-4-yl]methyl]-7-methylimidazo[4,5-b]-pyridine-5-carboxylic acid