1,2-Dimethoxyethane → Methyl 4-fluoro-2-(pyridin-4-yl)benzoate

HRID 240388

Reaction equation

Br[C:2]1[CH:11]=[C:10]([F:12])[CH:9]=[CH:8][C:3]=1[C:4]([O:6][CH3:7])=[O:5].[N:13]1[CH:18]=[CH:17][C:16](B(O)O)=[CH:15][CH:14]=1.C(=O)([O-])[O-].[Na+].[Na+].COCCOC>O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[F:12][C:10]1[CH:9]=[CH:8][C:3]([C:4]([O:6][CH3:7])=[O:5])=[C:2]([C:16]2[CH:17]=[CH:18][N:13]=[CH:14][CH:15]=2)[CH:11]=1

Participants

Conditions

Temperature: 120 °C

Procedure

A mixture of methyl 2-bromo-4-fluorobenzoate (1.5 g), pyridine-4-boronic acid (0.95 g), sodium carbonate (1.0 g), tetrakis(triphenylphosphine)palladium(0) (0.22 g), water (1.5 mL) and DME (9.0 mL) was stirred at 120° C. for 1 hr under microwave irradiation. The reaction mixture was diluted with water, and the mixture was extracted with ethyl acetate. The extract was washed with water and saturated brine, and dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane) to give the title compound (0.89 g).

Workup

extractionthe mixture was extracted with ethyl acetate
washThe extract was washed with water and saturated brine
dry with materialdried over anhydrous magnesium sulfate
customthe solvent was evaporated under reduced pressure
customThe residue was purified by silica gel column chromatography (ethyl acetate/hexane)

Sources & evidence

ORD record: ord-89dd4d2c2a084f85bd96e995b2749b6f
Source dataset: uspto-grants-2014_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08648079B2

Linked notes

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