反应详情

温度

65 °C

Triethylamine (5.73 mL, 41.2 mmol) was added to phosphorus oxychloride (60 mL), followed by 4-hydroxy-N,N-bis(4-methoxybenzyl)-2-oxo-1,2-dihydroquinoline-3-carboxamide (Example 74c) (6.11 g, 13.7 mmol). The reaction was heated at 65° C. for 4 hours, then cooled to room temperature and carefully poured into ice water (1200 mL). The solution was extracted dichloromethane (2×200 mL. The organic layers were combined and washed with water, dried over MgSO4, filtered and evaporated. The residue was dissolved in dichloromethane (18 mL) and poured into 200 mL of 30% hexanes in diethyl ether. The resultant precipitate was collected by filtration to give crude 4-chloro-N,N-bis(4-methoxybenzyl)-2-oxo-1,2-dihydroquinoline-3-carboxamide (4.25 g, 67%) which was used without further purification. MS 463 (MH+).

1. temperaturecooled to room temperature
2. extractionThe solution was extracted dichloromethane (2×200 mL
3. washwashed with water
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. customevaporated
7. dissolutionThe residue was dissolved in dichloromethane (18 mL)
8. additionpoured into 200 mL of 30% hexanes in diethyl ether
9. filtrationThe resultant precipitate was collected by filtration