反应详情

When n-butyl alcohol is replaced by propane-2ol and 7-chloro-3,5-dimethyl-3H-imidazo[4,5-b]pyridine-6-carboxylic acid, ethyl ester is processed as described for 3-butyl-7-chloro-5-methyl-3H-imidazo[4,5-b]pyridine-6-carboxylic acid, ethyl ester in Example 5, 3,5-dimethyl-7-(1-methylethoxy)-3H-imidazo[4,5-b]pyridine-6-carboxylic acid ethyl ester is obtained. Yield 67%, b.p. 170°-175°/0.01. The free acid is obtained as described in Example 9. The potassium salt is obtained by substituting potassium hydroxide for sodium hydroxide in that example.