反应详情

温度

25 °C

TSTU (108 mg, 0.36 mmol) was added portionwise to 8-(1-hydroxyethyl)-2-morpholino-4-oxo-4H-chromene-6-carboxylic acid (115 mg, 0.36 mmol, as described in Example 3.00) and DIPEA (0.069 mL, 0.40 mmol) suspended in DCM (1 mL) at 25° C. under nitrogen. The resulting mixture was stirred at 25° C. for 1.5 hrs. Dimethylamine (0.180 ml, 0.36 mmol) was then added and stirring was maintained for an additional 30 min. The mixture was pou red onto a silica gel column and purified by flash chromatography eluting with 5% methanolic ammonia (7 N) in dichloromethane. The solvent was evaporated to dryness. The residue was triturated in diethyl ether, collected by filtration and dried to afford 8-(1-hydroxyethyl)-N,N-dimethyl-2-morpholino-4-oxo-4H-chromene-6-carboxamide (123 mg, 0.355 mmol, 99%) as a off-white solid. Mass Spectrum: M+H+ 347.

1. stirringstirring
2. temperaturewas maintained for an additional 30 min
3. custompurified by flash chromatography
4. washeluting with 5% methanolic ammonia (7 N) in dichloromethane
5. customThe solvent was evaporated to dryness
6. customThe residue was triturated in diethyl ether
7. filtrationcollected by filtration
8. customdried