反应详情

To 5-(2-isopropyl-4-methoxy-5-nitro-phenoxy)-pyrimidine-2,4-diamine (2.1 g, 6.58 mmol) suspended in ethanol (150 mL) in a Parr bomb, was added 10% palladium on charcoal (210 mg). After hydrogenation in the Parr hydrogenator overnight at 35 psi, the reaction was filtered through celite. The celite pad was washed with ethanol and ethyl acetate and the filtrate was concentrated. Purification with silica gel column chromatography (92/8/0.1 dichloromethane/methanol/ammonium hydroxide) gave 5-(5-amino-2-isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine as a pale orange solid (468 mg, 25%, (M+H)+=290), which was converted to the hydrochloride salt.

1. filtrationAfter hydrogenation in the Parr hydrogenator overnight at 35 psi, the reaction was filtered through celite
2. washThe celite pad was washed with ethanol and ethyl acetate
3. concentrationthe filtrate was concentrated
4. customPurification with silica gel column chromatography (92/8/0.1 dichloromethane/methanol/ammonium hydroxide)