Dimethylformamide → Methyl 4-(6-methoxy-3-methylquinolin-2-yl)benzoate

HRID 55778Notes

Reaction equation

Cl[C:2]1[C:11]([CH3:12])=[CH:10][C:9]2[C:4](=[CH:5][CH:6]=[C:7]([O:13][CH3:14])[CH:8]=2)[N:3]=1.[CH3:15][O:16][C:17]([C:19]1[CH:24]=[CH:23][C:22](B(O)O)=[CH:21][CH:20]=1)=[O:18].CN(C=O)C>O.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[CH3:14][O:13][C:7]1[CH:8]=[C:9]2[C:4](=[CH:5][CH:6]=1)[N:3]=[C:2]([C:22]1[CH:23]=[CH:24][C:19]([C:17]([O:16][CH3:15])=[O:18])=[CH:20][CH:21]=1)[C:11]([CH3:12])=[CH:10]2

Participants

Conditions

Temperature: 120 °C

Procedure

To a mixture of 2-chloro-6-methoxy-3-methylquinoline (100 mg, 0.482 mmol), 4-(methoxycarbonyl)phenylboronic acid (184 mg, 1.02 mmol), TEA (0.35 mL, 2.41 mmol), and PdCl2(dppf) (35 mg, 0.048 mmol) was added 2 mL of DMF under argon. The mixture was then stirred for 2.5 h at 120° C. in a microwave reactor. The crude mixture was then diluted with water (25 mL) and extracted with EtOAc (25 mL×2). The organics were washed with brine (50 mL), dried over sodium sulfate, and concentrated to yield 250 mg of crude material. The crude was purified via column chromatography with a gradient of 5% EtOAc in hexanes to 80% EtOAc in hexanes to yield 37 mg (25% yield) of methyl 4-(6-methoxy-3-methylquinolin-2-yl)benzoate.

Workup

extractionextracted with EtOAc (25 mL×2)
washThe organics were washed with brine (50 mL)
dry with materialdried over sodium sulfate
concentrationconcentrated
customto yield 250 mg of crude material
customThe crude was purified via column chromatography with a gradient of 5% EtOAc in hexanes to 80% EtOAc in hexanes

Sources & evidence

ORD record: ord-566c6ba9444145aa914b4bae42d128ca
Source dataset: uspto-grants-2016_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09433618B2

Reaction notes

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