反应详情

To a solution of 6-amino-N-[(1-butyl-4-piperidinyl)methyl]-5-chloro-2-oxo-1,2-dihydro-3-pyridinecarboxamide dihydrochloride (step 2 in example 3, 80 mg, 0.19 mmol) in N,N-dimethylformamide (3 ml), sodium hydride (60% dispersion in mineral oil, 39 mg, 0.97 mmol) was added at 0° C. and the mixture was stirred for 15 min at room temperature. The mixture was cooled to 0° C. and iodomethane (1.0 M in N,N-dimethylformamide, 0.19 ml, 0.19 mmol) was added. After stirring for 18 h at room temperature, the mixture was poured into water, extracted with ethyl acetate (50 ml×2), washed with water (50 ml) and brine (50 ml) and dried over magnesium sulfate. Removal of solvent gave pale yellow oil, which was chromatographed on a column of silica gel eluting with 25% ammonium hydroxide/methanol/dichloromethane (0.2:1:12) to give 4 mg (6%) of the title compound as a white solid.

1. temperatureThe mixture was cooled to 0° C.
2. stirringAfter stirring for 18 h at room temperature
3. extractionextracted with ethyl acetate (50 ml×2)
4. washwashed with water (50 ml) and brine (50 ml)
5. dry with materialdried over magnesium sulfate
6. customRemoval of solvent
7. customgave pale yellow oil, which
8. customwas chromatographed on a column of silica gel eluting with 25% ammonium hydroxide/methanol/dichloromethane (0.2:1:12)