反应详情

To a solution of tert-Butyl 3-(3-(methoxycarbonyl)benzyl)-4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decane-8-carboxylate (2 g, 4.17 mmol) in methanol (28 mL) was added lithium hydroxide monohydrate (0.35 g, 8.34 mmol) in water (14 mL). After stirring at room temperature for 18 h, the reaction mixture was concentrated in vacuo, acidified with dilute citric acid, extracted with dichloromethane. The organic extracts were washed with brine, dried over MgSO4, filtered and concentrated to obtain 3-((8-(tert-butoxycarbonyl)-4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoic acid (1.88 g, 97%).

1. concentrationthe reaction mixture was concentrated in vacuo
2. extractionextracted with dichloromethane
3. washThe organic extracts were washed with brine
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated