Toluene → 5-[3-(Methoxycarbonyl)phenyl]furan-2-carboxylic acid

HRID 332619Notes

Reaction equation

Br[C:2]1[O:6][C:5]([C:7]([OH:9])=[O:8])=[CH:4][CH:3]=1.[CH3:10][O:11][C:12]([C:14]1[CH:15]=[C:16](B(O)O)[CH:17]=[CH:18][CH:19]=1)=[O:13].C(=O)([O-])O.[Na+].C1(C)C=CC=CC=1>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.O.O1CCCC1>[CH3:10][O:11][C:12]([C:14]1[CH:19]=[C:18]([C:2]2[O:6][C:5]([C:7]([OH:9])=[O:8])=[CH:4][CH:3]=2)[CH:17]=[CH:16][CH:15]=1)=[O:13]

Participants

Conditions

Temperature: 90 °C

Procedure

To 5-bromofuran-2-carboxylic acid (0.50 g, 2.6 mmol), 3-methoxycarbonylphenylboronic acid (0.52 g, 2.9 mmol), tetrakis(triphenylphosphine)palladium (45 mg, 0.039 mmol), and sodium hydrogen carbonate (0.49 g, 5.9 mmol) were added toluene (3.5 ml), tetrahydrofuran (3.0 mL) and water (3.5 ml), and the mixture was stirred at 90° C. for 2 hours. Water was added to the reaction mixture, and the mixture was washed with ethyl acetate. The aqueous layer was acidified with 1N hydrochloric acid, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, dried over anhydrous sodium sulfate and concentrated under reduced pressure to give the title compound as a pale-yellow powder (0.58 g, 2.3 mmol, 91%).

Workup

washthe mixture was washed with ethyl acetate
extractionthe mixture was extracted with ethyl acetate
washThe ethyl acetate layer was washed with saturated brine
dry with materialdried over anhydrous sodium sulfate
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-5094ce7cb2e34f938e93bb27c56e8d5c
Source dataset: uspto-grants-2014_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08877805B2

Reaction notes

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