反应详情

温度

50 °C

1-(1-tert-Butylcarbonylmethyl-2-oxo-5-cyclohexyl-8-methyl-1,3,4,5-tetrahydro-2H-1,5-benzodiazepin-3-yl)-3-(3-ethoxycarbonylphenyl)urea (370 mg) was suspended in methanol (5 ml), aqueous lithium hydroxide monohydrate (142 mg) solution (5 ml) was added to the suspension, and the mixture was stirred at 50° C. for 2 hours. The reaction mixture was filtrated. The filtrate was acidified with 1N hydrochloric acid, and methanol was evaporated. The mixture was extracted with ethyl acetate, the organic layer was washed with saturated brine, and dried over anhydrous sodium sulfate, the solvent was evaporated under reduced pressure. The residue was recrystallized from isopropyl alcohol, to thereby obtain 300 mg of the title compound (Yield: 83%).

1. filtrationThe reaction mixture was filtrated
2. customwas evaporated
3. extractionThe mixture was extracted with ethyl acetate
4. washthe organic layer was washed with saturated brine
5. dry with materialdried over anhydrous sodium sulfate
6. customthe solvent was evaporated under reduced pressure
7. customThe residue was recrystallized from isopropyl alcohol