反应详情

Using 2-hydrazino-5-methyl-1H-benzimidazole (4) obtained in Example 1, step 3 and ethyl 2-acetyl-3-(2-naphthyl)propanoate (39), and by a method similar to that in Example 1, step 4, 3-methyl-1-(5-methyl-1H-benzimidazol-2-yl)-4-(2-naphthylmethyl)-1H-pyrazol-5-ol (40) was obtained.