반응 #77190

반응 방정식

ethyl 8-chloro-4-oxo-4H-quinolizine-3-carboxylate

Ethyl 8-Chloro-4-oxo-4H-quinolizine-3-carboxylate

sodium hydride

DMF

m-nitrophenol

→

solid

수율 67.0%

Ethyl 8-(3-Nitrophenoxy)-4-oxo-4H-quinolizine-3-carboxylate

수율 67.0%

용매

ethyl acetate

water

반응 조건

후처리

1. 1
   기타An oven-dried 50 ml three-necked round-bottom flask was purged with argon
2. 2
   추출The aqueous layer was extracted three times with 200 ml dichloromethane
3. 3
   세척the combined organic layers were washed three times with 200 ml water
4. 4
   기타The organic solvent was evaporated
5. 5
   workup.STIRRINGthe crude product was stirred overnight with 30 ml ether
6. 6
   여과Filtration

실험 절차

An oven-dried 50 ml three-necked round-bottom flask was purged with argon and charged with sodium hydride (200 mg, 60% suspension in oil, 5 mmol and washed with hexane) and 10 ml dry DMF. To this suspension, m-nitrophenol (626 mg, 4.5 mmol) was added in one portion. After gas evolution had ceased, ethyl 8-chloro-4-oxo-4H-quinolizine-3-carboxylate (2) (1.00 g, 4 mmol) was added in one portion and stirring was continued at room temperature for 2 h. When the reaction was complete as indicated by thin layer chromatography (ethyl acetate), the reaction mixture was poured into 250 ml of water. The aqueous layer was extracted three times with 200 ml dichloromethane, and the combined organic layers were washed three times with 200 ml water. The organic solvent was evaporated and the crude product was stirred overnight with 30 ml ether. Filtration gave a bright yellow solid (950 mg, 67%). M.p. 161-163° C. 1H NMR (δ, CDCl3): 1.42 (t, J=7 Hz, 3H), 4.41 (q, J=7 Hz, 2H), 6.39 (d, J=8 Hz, 1H), 6.70 (d, J=2 Hz, 1H), 6.99 (dd, J=0.5 Hz, J=7 Hz, 1H), 7.55 (d, J=7 Hz, 1H), 7.72 (dd, J=8 Hz, J=8 Hz, 1H), 8.07 (s, 1H), 8.24 (d, J=8 Hz, 1H), 8.32 (d, J=8 Hz, 1H), 9.43 (d, J=7 Hz, 1H). MS: m/z 354.0850; required for C18H14N2O6: 354.0852.

출처