反应详情

The above derivative (118ba) (1.96 g) was dissolved in MeOH (15 ml) prior to the addition of 37% formaldehyde in water (1.41 ml). After 10 min, NaBH3CN (708 mg) was added. After 2 h, the reaction was concentrated. EtOAc was added and the organic layer was washed with H2O, brine, dried, filtered, and concentrated to give [(1S,2R,4R)-2-(4-Bromo-benzenesulfonylmethyl)-4-(isopropyl-methyl-amino)-cyclohexyl]-carbamic acid benzyl ester (1.9 g), MS found: (M+H)+=539.3

1. waitAfter 2 h
2. concentrationthe reaction was concentrated
3. additionEtOAc was added
4. washthe organic layer was washed with H2O, brine
5. customdried
6. filtrationfiltered
7. concentrationconcentrated