1,4-Dioxane → [3-(2,4-dichlorobenzyl)-2-ethyl-8-fluoro-4-oxo-1,4-dihydroquinolin-5-yloxy]acetic Acid Methyl Ester

HRID 2266566Notes

Reaction equation

[CH3:1][O:2][C:3](=[O:14])[CH2:4][O:5][C:6]1[CH:11]=[CH:10][C:9]([F:12])=[C:8]([NH2:13])[CH:7]=1.C[O:16][C:17](=O)[CH:18]([CH2:23][C:24]1[CH:29]=[CH:28][C:27]([Cl:30])=[CH:26][C:25]=1[Cl:31])[C:19](=O)[CH2:20][CH3:21].O1CCOCC1>C(OCC)(=O)C>[CH3:1][O:2][C:3](=[O:14])[CH2:4][O:5][C:6]1[CH:11]=[CH:10][C:9]([F:12])=[C:8]2[C:7]=1[C:17](=[O:16])[C:18]([CH2:23][C:24]1[CH:29]=[CH:28][C:27]([Cl:30])=[CH:26][C:25]=1[Cl:31])=[C:19]([CH2:20][CH3:21])[NH:13]2

Participants

Conditions

Temperature: 120 °C

Procedure

A mixture of (3-amino-4-fluorophenoxy)acetic acid methyl ester (0.75 g), 2-(2,4-dichlorobenzyl)-3-oxopentanoic acid methyl ester (1.3 g), polyphosphoric acid (5 mL) and dioxane (25 mL) was heated at 120° C. for 17 hours. The mixture was cooled to room temperature, diluted with ethyl acetate and this mixture washed with water, saturated aqueous sodium hydrogen carbonate solution and saturated aqueous sodium chloride solution and then dried over magnesium sulfate. The solvent was removed under reduced pressure to afford title compound as a brown oil, 1.7 μg.

Workup

temperatureThe mixture was cooled to room temperature
washthis mixture washed with water, saturated aqueous sodium hydrogen carbonate solution and saturated aqueous sodium chloride solution
dry with materialdried over magnesium sulfate
customThe solvent was removed under reduced pressure

Sources & evidence

ORD record: ord-a16e40c9af5a427cb48e6456e0465668
Source dataset: uspto-grants-2010_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07858640B2

Reaction notes

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