反应详情

To a solution of tert-butyl (3S,5R)-3-[({1-[2-(ethenyloxy)ethyl]-1H-benzimidazol-2-yl}carbonyl)(2-methylpropyl)amino]-5-(morpholin-4-ylcarbonyl)piperidine-1-carboxylate (323 mg) and 1M diethylzinc-hexane solution (2.5 ml) in dichloromethane (5 ml) was added dropwise diiodomethane (443 μl) at room temperature over 5 min, and the mixture was stirred at room temperature for 3 hr. The reaction mixture was diluted with 1M hydrochloric acid, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure. The residue was dissolved in methanol (5 ml), 4M hydrogen chloride-ethyl acetate (5 ml) was added and the mixture was stirred at room temperature for 5 hr. The reaction mixture was concentrated, and the residue was subjected to reversed-phase preparative HPLC and the eluted fraction was concentrated under reduced pressure. The residue was diluted with aqueous sodium bicarbonate, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, and dried over anhydrous sodium sulfate. 4M Hydrogen chloride-ethyl acetate (1 ml) was added and the mixture was stirred for 5 min. The solvent was evaporated under reduced pressure to give the object product (35 mg).

1. extractionthe mixture was extracted with ethyl acetate
2. washThe extract was washed with saturated brine
3. dry with materialdried over anhydrous sodium sulfate
4. customThe solvent was evaporated under reduced pressure
5. dissolutionThe residue was dissolved in methanol (5 ml)
6. addition4M hydrogen chloride-ethyl acetate (5 ml) was added
7. stirringthe mixture was stirred at room temperature for 5 hr
8. concentrationThe reaction mixture was concentrated
9. concentrationthe eluted fraction was concentrated under reduced pressure
10. additionThe residue was diluted with aqueous sodium bicarbonate
11. extractionthe mixture was extracted with ethyl acetate
12. washThe extract was washed with saturated brine
13. dry with materialdried over anhydrous sodium sulfate
14. addition4M Hydrogen chloride-ethyl acetate (1 ml) was added
15. stirringthe mixture was stirred for 5 min
16. customThe solvent was evaporated under reduced pressure