Ethyl Acetate → Ethyl 5-fluoro-1-(3-fluorobenzyl)-1H-indole-2-carboxylate

HRID 505628Notes

Reaction equation

[F:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][C:6]([C:11]([O:13][CH2:14][CH3:15])=[O:12])=[CH:5]2.[F:16][C:17]1[CH:18]=[C:19]([CH:22]=[CH:23][CH:24]=1)[CH2:20]Cl.C(=O)([O-])[O-].[K+].[K+].C(OCC)(=O)C>CN(C)C=O>[F:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[N:7]([CH2:20][C:19]1[CH:22]=[CH:23][CH:24]=[C:17]([F:16])[CH:18]=1)[C:6]([C:11]([O:13][CH2:14][CH3:15])=[O:12])=[CH:5]2

Participants

Conditions

Temperature: 60 °C

Procedure

A suspension of 0.207 g (1 mmol) of ethyl 5-fluoro-1H-indole-2-carboxylate, 0.173 g (1.2 mmol) of 3-fluorobenzyl chloride and 0.276 g (2 mmol) of potassium carbonate in 10 ml of dimethylformamide is stirred at 60° C. for 24 hours. The reaction mixture is subsequently cooled and is poured into a mixture of ice-cold water and of ethyl acetate. After settling, the organic phase is separated and then it is washed with two times 50 ml of water and then with 50 ml of a saturated sodium chloride solution. The solution is dried over magnesium sulfate and is filtered, and then the filtrate is concentrated under reduced pressure. 0.195 g of an oil is obtained, which oil is used as is in the following stage.

Workup

temperatureThe reaction mixture is subsequently cooled
customthe organic phase is separated
washit is washed with two times 50 ml of water
dry with materialThe solution is dried over magnesium sulfate
filtrationis filtered
concentrationthe filtrate is concentrated under reduced pressure

Sources & evidence

ORD record: ord-16b53bb58b4241b284e1e0a343d39323
Source dataset: uspto-grants-2010_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07781477B2

Reaction notes

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