反应详情

N-(3,5-bis-trifluoromethyl-phenyl)-2-hydroxy-5-nitro-benzamide (400 mg, 1.4 mmol) prepared in step 1 was dissolved in 4.2 . of isopropanol (IPA), to which 3 g of iron powder and 3 . of NH4Cl saturated solution were added.