Potassium Carbonate → Ethyl 1-(2-acetoxyethyl)-6-(2,3-dichlorobenzyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylate

HRID 347882Notes

Reaction equation

[Cl:1][C:2]1[C:24]([Cl:25])=[CH:23][CH:22]=[CH:21][C:3]=1[CH2:4][C:5]1[CH:6]=[C:7]2[C:12](=[CH:13][CH:14]=1)[NH:11][CH:10]=[C:9]([C:15]([O:17][CH2:18][CH3:19])=[O:16])[C:8]2=[O:20].[C:26]([O:29][CH2:30][CH2:31]Br)(=[O:28])[CH3:27].C(=O)([O-])[O-].[K+].[K+].[Cl-].[NH4+]>CN(C)C=O>[C:26]([O:29][CH2:30][CH2:31][N:11]1[C:12]2[C:7](=[CH:6][C:5]([CH2:4][C:3]3[CH:21]=[CH:22][CH:23]=[C:24]([Cl:25])[C:2]=3[Cl:1])=[CH:14][CH:13]=2)[C:8](=[O:20])[C:9]([C:15]([O:17][CH2:18][CH3:19])=[O:16])=[CH:10]1)(=[O:28])[CH3:27]

Participants

Conditions

Temperature: 80 °C

Procedure

Ethyl 6-(2,3-dichlorobenzyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylate obtained in Step 3 (400 mg, 1.1 mmol) was suspended in dimethylformamide (DMF; 8 ml) and 2-bromoethyl acetate (152 μl, 1.4 mmol) and potassium carbonate (440 mg, 3.2 mmol) were added. The mixture was stirred with heating at 80° C. During the stirring, 2-bromoethyl acetate (152 μl, 1.4 mmol) was added twice and the mixture was stirred with heating at 80° C. for the total of 1.5 hrs. After allowing the mixture to cool, saturated aqueous ammonium chloride was added to the reaction solution, and the precipitate was collected by filtration, washed with water and vacuum-dried to give an object product (468 mg, yield 95%) as a white solid.

Workup

stirringthe mixture was stirred
temperaturewith heating at 80° C. for the total of 1.5 hrs
temperatureto cool
filtrationthe precipitate was collected by filtration
washwashed with water
customvacuum-dried

Sources & evidence

ORD record: ord-1e09740fa11745e4a519b522a6f21cbe
Source dataset: uspto-grants-2007_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07176220B2

Reaction notes

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