反应详情

Using 2-hydrazino-5-methyl-1H-benzimidazole (4) obtained in Example 1, step 3 and ethyl 2-acetyl-3-(4-chlorophenyl)propanoate (31), and by a method similar to that in Example 1, step 4, 4-[(4-chlorophenyl)methyl]-3-methyl-1-(5-methyl-1H-benzimidazol-2-yl)-1H-pyrazol-5-ol (32) was obtained.