甲醇 、
1-[9-(4-chlorophenyl)-8-(2-chlorophenyl)-9H-purin-6-yl]-4-methyl-aminopiperidine-4-carboxylic acid amide 在
Amberlyst 15 作用下,
反应 20.0h,
以55%的产率得到1-[9-(4-chlorophenyl)-8-(2-chlorophenyl)-9H-purin-6-yl]-4-methylaminopiperidine-4-carboxylic acid methyl ester