反应详情

To a solution of the product from Step B (0.68 g, 2.0 mmol) in methanol was added Pd/C (10%, 0.10 g) under a nitrogen atmosphere at room temperature. The mixture was stirred for 20 h under a hydrogen atmosphere and filtered through a filter aid. The filtrate was evaporated to a residue which was purified by chromatography (silica, 5% methanol in dichloromethane to 10% methanol in dichloromethane) to give a syrup (0.40 g, 97%). Treatment of the syrup with fumaric acid gave a residue that was recrystallized from methanol/ether to provide a colorless solid: mp 151–152° C.; MS (ES) m/z 206 (M+). Analysis. Calculated for C11H15N3O.1.0 C4H4O4. 1.0H2O: C, 53.09; H, 6.24; N, 12.38. Found: C, 52.88; H, 6.31; N, 12.14.

1. filtrationfiltered through a filter aid
2. customThe filtrate was evaporated to a residue which
3. customwas purified by chromatography (silica, 5% methanol in dichloromethane to 10% methanol in dichloromethane)