反应详情

To a solution of 2-[(2,3-dimethylphenyl)amino]benzaldehyde oxime (2.0 g, 8.4 mmol) and methyl orange (20 mg as an indicator), in methanol (40 ml) and water (10 ml) is added sodium cyanoborohydride (4.0 g, 64 mmol) in small portions over two hours, maintaining a red color of the indicator by the dropwise addition of concentrated HCl. The reaction of mixture is diluted with ethyl acetate (200 ml) and the aqueous layer is neutralized to pH=7 with 1N NaOH. The organic layer is collected, dried (MgSO4) and the solvent is evaporated to give crude 2-[(2,3-dimethylphenyl)amino]-N-hydroxy-benzenemethanamine as an oil which is used without further purification in the next step.

1. temperaturemaintaining a red color of the indicator
2. customThe reaction of mixture
3. customThe organic layer is collected
4. dry with materialdried (MgSO4)
5. customthe solvent is evaporated