Water → 4-Chloro-2-fluoro-5-isopropoxy-nitrobenzene

HRID 2295941Notes

Reaction equation

[Cl:1][C:2]1[CH:7]=[C:6]([F:8])[C:5]([N+:9]([O-:11])=[O:10])=[CH:4][C:3]=1[OH:12].C(=O)([O-])[O-].[K+].[K+].[CH:19](I)([CH3:21])[CH3:20].O>C(#N)C>[Cl:1][C:2]1[C:3]([O:12][CH:19]([CH3:21])[CH3:20])=[CH:4][C:5]([N+:9]([O-:11])=[O:10])=[C:6]([F:8])[CH:7]=1

Participants

Conditions

Temperature: 20 °C

Procedure

To a solution of 2-chloro-4-fluoro-5-nitrophenol (19.1 g) in acetonitrile (100 ml), there was added anhydrous potassium carbonate (8 g). After stirring at room temperature (ca. 20° C.) for several minutes, isopropyl iodide (25 g) was added thereto, and the resultant mixture was heated under reflux for 3 hours. After being allowed to cool to room temperature (ca. 20° C.), water was added thereto, and the reaction mixture was extracted with ether. The ether extract was washed with a 5% aqueous sodium hydroxide solution and water in order, dried over anhydrous magnesium sulfate and filtered. The filtrate was concentrated under reduced pressure, and the residue was recrystallized from ethanol to give 13.5 g of 4-chloro-2-fluoro-5-isopropoxynitrobenzene. M.P., 61.3°-62.4° C.

Workup

temperatureunder reflux for 3 hours
additionwas added
extractionthe reaction mixture was extracted with ether
extractionThe ether extract
washwas washed with a 5% aqueous sodium hydroxide solution and water in order
dry with materialdried over anhydrous magnesium sulfate
filtrationfiltered
concentrationThe filtrate was concentrated under reduced pressure
customthe residue was recrystallized from ethanol

Sources & evidence

ORD record: ord-9b22749c13b34d29855b727973ec798a
Source dataset: uspto-grants-1984_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04427438

Reaction notes

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