tert-butyl 4-(4,5-diamino-2-fluorophenyl)piperazine-1-carboxylate 、
4-nitro-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazole-3-carbaldehyde 在
二氯甲烷,丙烷-2-酮 作用下,
以
甲醇 为溶剂,
反应 16.0h,
以530 mg of 4-{6-fluoro-2-[4-nitro-1-(tetrahydropyran-2-yl)-1H-pyrazol-3-yl]-3H-benzimidazol-5-yl}piperazine-1-carboxylic acid tert-butyl ester are isolated in the form of a red foam的产率得到4-{6-fluoro-2-[4-nitro-1-(tetrahydropyran-2-yl)-1H-pyrazol-3-yl]-3H-benzimidazol-5-yl}piperazine-1-carboxylic acid tert-butyl ester