反应详情

To a cold (0° C.) solution of tert-butyl 4-[4-(acetylamino)-3-hydroxyphenyl]-2-amino-6-{2-(cyclopropylmethoxy)-6-[(4-methoxybenzyl)oxy]phenyl}nicotinate (1.65 g, 2.64 mmol) in THF (25.0 mL) under argon atmosphere was added a solution of sodium bis(2-methoxyethoxy)aluminum hydride (3.7 N in toluene, 4.12 mL, 21.1 mmol) in THF (3 mL) dropwise. After being stirred for 30 minutes, the mixture was quenched with ethyl acetate and poured into saturated aqueous sodium potassium tartarate. The extracted organic phase was washed with brine, dried over Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (dichloromethane:methanol, 19:1-9:1) to give N-{4-[2-amino-6-{2-(cyclopropylmethoxy)-6-[(4-methoxybenzyl)oxy]phenyl}-3-(hydroxymethyl)-4-pyridinyl]-2-hydroxyphenyl}acetamide (0.48 g, 33%); LC-MS (m/z=556, M+1).

1. customthe mixture was quenched with ethyl acetate
2. additionpoured into saturated aqueous sodium potassium tartarate
3. washThe extracted organic phase was washed with brine
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by column chromatography on silica gel (dichloromethane:methanol, 19:1-9:1)