Water → 1-(3-hydroxynaphthalen-2-yl)ethanone

HRID 228731Notes

Reaction equation

COCN[C:5]([C:7]1[C:16]([OH:17])=[CH:15][C:14]2[C:9](=[CH:10][CH:11]=[CH:12][CH:13]=2)[CH:8]=1)=[O:6].[CH3:18][Mg]Br.[Cl-].[NH4+].O>O1CCCC1>[OH:17][C:16]1[C:7]([C:5](=[O:6])[CH3:18])=[CH:8][C:9]2[C:14]([CH:15]=1)=[CH:13][CH:12]=[CH:11][CH:10]=2

Participants

Conditions

Temperature: -78 °C

Procedure

3-Hydroxynaphthalene-2-carboxylic acid methoxymethylamide (600 mg) was dissolved in tetrahydrofuran (36 ml) to prepare a solution. A solution (9.8 ml) of 0.93 M methylmagnesium bromide in tetrahydrofuran was added thereto at −78° C., temperature of the mixture was raised to room temperature, and the mixture was stirred for 1.5 hr. A saturated aqueous ammonium chloride solution was added to stop the reaction, water was added thereto, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was then washed with an aqueous potassium carbonate solution, was washed with water and was dried over anhydrous sodium sulfate. The solvent was removed by distillation under the reduced pressure, and the residue was purified by column chromatography using hexane-ethyl acetate to give 1-(3-hydroxynaphthalen-2-yl)-ethanone (378 mg, yield 78%).

Workup

customto prepare a solution
additionwas added
extractionthe mixture was extracted with ethyl acetate
washThe ethyl acetate layer was then washed with an aqueous potassium carbonate solution
washwas washed with water
dry with materialwas dried over anhydrous sodium sulfate
customThe solvent was removed by distillation under the reduced pressure
customthe residue was purified by column chromatography

Sources & evidence

ORD record: ord-822585761f4746eab6bafe44482be42d
Source dataset: uspto-grants-2009_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07560558B2

Reaction notes

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