反应详情

温度

80 °C

A suspension of Intermediate 26a (0.20 g), and potassium carbonate (0.31 g) in 1,3-dimethyl-2-imidazolidinone (3 ml, Tokyo Kasei Kogyo) was added with 25% aqueous ammonia (2 ml), and the mixture was stirred at 80° C. for 24 hours in a sealed tube. The reaction mixture was added with saturated brine (30 ml), and extracted 3 times with chloroform (30 ml for each time). The combined organic layer was washed twice with saturated brine (50 ml for each time), and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel chromatography (chloroform:methanol=9:1) to obtain the title compound (64.4 mg).

1. extractionextracted 3 times with chloroform (30 ml for each time)
2. washThe combined organic layer was washed twice with saturated brine (50 ml for each time), and
3. dry with materialdried over anhydrous magnesium sulfate
4. customThe solvent was evaporated under reduced pressure
5. customthe residue was purified by silica gel chromatography (chloroform:methanol=9:1)