反应详情

1-tert-Butyl 3-methyl (3R,5S)-5-{[(2-tert-butyl-4-hexylpyrimidin-5-yl)carbonyl](2-methylpropyl)amino}piperidine-1,3-dicarboxylate (219 mg) was dissolved in methanol (3 ml) and THF (2 ml), 1M aqueous sodium hydroxide solution (2 ml) was added and the mixture was stirred at room temperature for 2 hr. The reaction mixture was concentrated under reduced pressure, and the aqueous layer of the mixture was adjusted to pH 5-6 with saturated aqueous ammonium chloride solution, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. The obtained residue, morpholine (41 μl), 1H-benzotriazol-1-ol (30 mg) and triethylamine (140 μl) were dissolved in 1,2-dichloroethane (4 ml), WSC.HCl (115 mg) was added and the mixture was stirred at room temperature for 3 days. The reaction mixture was poured into water, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. The residue was subjected to silica gel column chromatography, and a fraction eluted with ethyl acetate-hexane (5:95-80:20) was concentrated under reduced pressure to give the object product (88 mg).

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. extractionthe mixture was extracted with ethyl acetate
3. washThe extract was washed with saturated brine
4. dry with materialdried over anhydrous magnesium sulfate
5. customThe solvent was evaporated under reduced pressure
6. dissolutionThe obtained residue, morpholine (41 μl), 1H-benzotriazol-1-ol (30 mg) and triethylamine (140 μl) were dissolved in 1,2-dichloroethane (4 ml)
7. additionWSC.HCl (115 mg) was added
8. stirringthe mixture was stirred at room temperature for 3 days
9. additionThe reaction mixture was poured into water
10. extractionthe mixture was extracted with ethyl acetate
11. washThe extract was washed with saturated brine
12. dry with materialdried over anhydrous magnesium sulfate
13. customThe solvent was evaporated under reduced pressure
14. washa fraction eluted with ethyl acetate-hexane (5:95-80:20)
15. concentrationwas concentrated under reduced pressure