1,4-Dioxane → 3-(4-fluoro-phenylmethyl)-1-methyl-1H-indole-5-carboxylic acid methyl ester
Reaction equation
[CH3:1][O:2][C:3]([C:5]1[CH:6]=[C:7]2[C:11](=[CH:12][CH:13]=1)[N:10]([CH3:14])[CH:9]=[CH:8]2)=[O:4].[F:15][C:16]1[CH:23]=[CH:22][C:19]([CH2:20]Br)=[CH:18][CH:17]=1.O1CCOCC1>CCOCC>[CH3:1][O:2][C:3]([C:5]1[CH:6]=[C:7]2[C:11](=[CH:12][CH:13]=1)[N:10]([CH3:14])[CH:9]=[C:8]2[CH2:20][C:19]1[CH:22]=[CH:23][C:16]([F:15])=[CH:17][CH:18]=1)=[O:4]Participants
Procedure
A solution of 1-methyl-1H-indole-5-carboxylic acid methyl ester (0.17 g, 0.9 mmol), prepared using procedures as described in Example 1, Ag2O) (0.22 g, 0.95 mmol), 4-fluoro-benzyl bromide (0.18 g, 0.95 mmol) and dioxane (4 mL) were heated to reflux for 16 hr, then more 4-fluoro-benzyl bromide (90 mg, 0.5 mmol) was added and the solution was heated at reflux an additional 4 hr. After cooling to room temperature, the reaction mixture was diluted with ether (60 mL), washed with aq. NH4Cl (50 mL) and then brine (50 mL). The organic layer was dried over MgSO4, filtered and concentrated. The remaining residue was subjected to flash chromatography (ethyl acetate/hexane, 1:3) to provide 3-(4-fluoro-phenylmethyl)-1-methyl-1H-indole-5-carboxylic acid methyl ester (58 mg, 22% yield).
Workup
- temperaturewere heated
- temperatureto reflux for 16 hr
- temperaturethe solution was heated
- temperatureat reflux an additional 4 hr
- washwashed with aq. NH4Cl (50 mL)
- dry with materialThe organic layer was dried over MgSO4
- filtrationfiltered
- concentrationconcentrated
Sources & evidence
- ORD record
- ord-b6452b396d934bc7a9190e6d3d4688f5
- Source dataset
- uspto-grants-2014_12
- Patent number
- US08900565B2
Reaction notes
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