Hydrochloric Acid → 1-[(2,3-Difluoro-6-nitrophenyl)oxy]naphthalene

HRID 1875042Notes

Reaction equation

[H-].[Na+].[C:3]1([OH:13])[C:12]2[C:7](=[CH:8][CH:9]=[CH:10][CH:11]=2)[CH:6]=[CH:5][CH:4]=1.[F:14][C:15]1[CH:20]=[CH:19][C:18]([N+:21]([O-:23])=[O:22])=[C:17](F)[C:16]=1[F:25].Cl>C1COCC1>[F:25][C:16]1[C:15]([F:14])=[CH:20][CH:19]=[C:18]([N+:21]([O-:23])=[O:22])[C:17]=1[O:13][C:3]1[C:12]2[C:7](=[CH:8][CH:9]=[CH:10][CH:11]=2)[CH:6]=[CH:5][CH:4]=1

Participants

Conditions

Temperature: 0 °C

Procedure

Sodium hydride (60% oil dispersion) (2.77 g, 69.4 mmol) was added to a solution of 1-naphthol (10.00 g, 69.4 mmol) in THF (200 mL) while cooling in an ice bath. The mixture was stirred at 0° C. for 30 min and 1,2,3-trifluoro-4-nitrobenzene (12.28 g, 69.4 mmol) was added and the mixture was allowed to warm to room temperature. After 2 hrs, the reaction mixture was poured into a mixture of ice and 10% aqueous HCl and was extracted with ethyl acetate. The organic layer was dried over sodium sulfate and the solvent was evaporated. The residue was purified by flash chromatography (hexane:ethyl acetate) to give the title compound (14.5 g, 69.4%). 1H NMR (400 MHz, chloroform-d) 6d ppm 8.31-8.45 (m, 1H), 7.82-7.99 (m, 2H), 7.54-7.66 (m, 3H), 7.30 (t, 1H), 7.17-7.26 (m, 1H), 6.61 (d, 1H).

Workup

temperaturewhile cooling in an ice bath
temperatureto warm to room temperature
waitAfter 2 hrs
extractionwas extracted with ethyl acetate
dry with materialThe organic layer was dried over sodium sulfate
customthe solvent was evaporated
customThe residue was purified by flash chromatography (hexane:ethyl acetate)

Sources & evidence

ORD record: ord-5754fab497e34ed2bf3620d911d70c18
Source dataset: uspto-grants-2012_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08304419B2

Reaction notes

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