Potassium Carbonate → Methyl 2,2'-dimethyl-1,1'-biphenyl-4-carboxylate

HRID 2410540Notes

Reaction equation

Br[C:2]1[CH:11]=[CH:10][C:5]([C:6]([O:8][CH3:9])=[O:7])=[CH:4][C:3]=1[CH3:12].[C:13]1([CH3:22])[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=1B(O)O.C(=O)([O-])[O-].[K+].[K+]>C1(C)C=CC=CC=1.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>[CH3:12][C:3]1[CH:4]=[C:5]([C:6]([O:8][CH3:9])=[O:7])[CH:10]=[CH:11][C:2]=1[C:14]1[CH:15]=[CH:16][CH:17]=[CH:18][C:13]=1[CH3:22]

Participants

Conditions

Temperature: 120 °C

Procedure

To a solution of methyl 4-bromo-3-methylbenzoate (ABCR, 15.0 g, 65 mmol) in toluene (200 mL) and water (200 mL), was added o-tolylboronic acid (10.7 g, 78 mmol) followed by potassium carbonate (45.3 g, 32.7 mmol) and tetrakis(triphenylphosphine)palladium(0) (3.78 g, 3.3 mmol). The mixture was degassed with N2 and refluxed at 120° C. for 6 hours. After the completion of reaction, the reaction mixture was cooled to RT. The organic phase was separated and evaporated under reduced pressure. The crude compound was passed through a silica column using hexane as eluent to get the title compound as a white solid (15 g, 95%). 1H NMR (DMSO-d6, 400 MHz) δ 7.91 (s, 1H), 7.82 (m, 1H), 7.32 (m, 2H), 7.27 (m, 1H), 7.24 (m, 1H), 7.06 (m, 1H), 3.84 (s, 3H), 2.09 (s, 3H), 1.95 (s, 3H). HPLC (Method B), Rt 3.01 min (purity: 98.71%).

Workup

customThe mixture was degassed with N2
customAfter the completion of reaction
temperaturethe reaction mixture was cooled to RT
customThe organic phase was separated
customevaporated under reduced pressure

Sources & evidence

ORD record: ord-1ae8d1beb03b4b8b858d921668d0e9a6
Source dataset: uspto-grants-2014_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08815919B2

Reaction notes

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