反应详情

To 0.235 g (0.66 mmol) of N2-diphenylmethylene-N4,N4-dipropylpyridine-2,4-diamine in 9 mL of methanol was added 0.13 g (1.6 mmol) of sodium acetate followed by 0.082 g (1.2 mmol) of hydroxylamine hydrochloride. The resulting clear golden reaction mixture was stirred at room temperature for 45 min and concentrated in vacuo. The crude solids were slurried in dichloromethane, filtered and the filtrate was concentrated. The resulting oil was purified by flash chromatography eluting with a 13% to 20% methanol/dichloromethane gradient containing 2% triethylamine to give 0.106 g (83%) of the title compound as a white solid.

1. concentrationconcentrated in vacuo
2. filtrationfiltered
3. concentrationthe filtrate was concentrated
4. customThe resulting oil was purified by flash chromatography
5. washeluting with a 13% to 20% methanol/dichloromethane gradient
6. additioncontaining 2% triethylamine