反应详情

By replacing 5-amino-6-ethylamino-4-chloro-2-methylpyridine-3-carboxylic acid, ethyl ester in Example 1 d with 5-amino-6-butylamino-4-chloro-2-methylpyridine-3-carboxylic acid, ethyl ester, 3-butyl-7-chloro-5-methyl-3H-imidazo[4,5-b]-pyridine-6-carboxylic acid, ethyl ester is obtained. Yield 83%, b.p. 190°-200°/0.01.

1. customin Example 1 d