反应详情

To a suspension of NaH (60% mineral oil, 11.2 mg, 0.28 mmol) in DMF (2 mL) at room temperature was added [2-(3-cyclopropyl-2,4-dioxo-3,4-dihydro-2H-quinazolin-1-ylmethyl)-1-(3-methyl-butyl)-1H-benzoimidazol-5-ylmethyl]-carbamic acid tert-butyl ester (50 mg, 0.094 mmol). After stirring for 5 min iodomethane (47 μL, 0.75 mmol) was added. The mixture was stirred overnight under a nitrogen atmosphere and partitioned between water and ethyl acetate. The aqueous phase was extracted with ethyl acetate and the combined organic phases washed with 5% sodium meta-bisulfite and brine. After drying over MgSO4 the residue was purified by flash chromatography (eluent 2% MeOH in CH2Cl2) to give [2-(3-cyclopropyl-2,4-dioxo-3,4-dihydro-2H-quinazolin-1-ylmethyl)-1-(3-methyl-butyl)-1H-benzoimidazol-5-ylmethyl]-methyl-carbamic acid tert-butyl ester (39 mg, 76%) as a white solid:

1. additionwas added
2. custompartitioned between water and ethyl acetate
3. extractionThe aqueous phase was extracted with ethyl acetate
4. washthe combined organic phases washed with 5% sodium meta-bisulfite and brine
5. dry with materialAfter drying over MgSO4 the residue
6. customwas purified by flash chromatography (eluent 2% MeOH in CH2Cl2)