反应详情

Methyl cis(±)-5-(4-{[(4-chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-methoxypiperidin-1-yl)-2-methylthiophene-3-carboxylate obtained in Example (188e) (16 mg) was dissolved in methanol (1 ml) and THF (1 ml). A 2 N aqueous lithium hydroxide solution (1 ml) was added, and the mixture was stirred at room temperature overnight. The organic solvent was evaporated under reduced pressure. Then, the residue was neutralized with 1 N hydrochloric acid, diluted with ethyl acetate, washed with brine, and dried over anhydrous sodium sulfate. Following concentration under reduced pressure, the residue was recrystallized from an ethyl acetate/hexane solvent to obtain the title compound as crystals.

1. customThe organic solvent was evaporated under reduced pressure
2. additiondiluted with ethyl acetate
3. washwashed with brine
4. dry with materialdried over anhydrous sodium sulfate
5. concentrationconcentration under reduced pressure
6. customthe residue was recrystallized from an ethyl acetate/hexane solvent