Pyridine → Methyl 2-hydroxy-3-(3-(pyridin-2-yl)benzamido)benzoate

HRID 415291Notes

Reaction equation

[NH2:1][C:2]1[C:3]([OH:12])=[C:4]([CH:9]=[CH:10][CH:11]=1)[C:5]([O:7][CH3:8])=[O:6].N1C=CC=CC=1.[N:19]1[CH:24]=[CH:23][CH:22]=[CH:21][C:20]=1[C:25]1[CH:26]=[C:27]([CH:31]=[CH:32][CH:33]=1)[C:28](Cl)=[O:29]>C1(C)C=CC=CC=1>[OH:12][C:3]1[C:2]([NH:1][C:28](=[O:29])[C:27]2[CH:31]=[CH:32][CH:33]=[C:25]([C:20]3[CH:21]=[CH:22][CH:23]=[CH:24][N:19]=3)[CH:26]=2)=[CH:11][CH:10]=[CH:9][C:4]=1[C:5]([O:7][CH3:8])=[O:6]

Participants

Conditions

Temperature: 70 °C

Procedure

Thionyl chloride (10 mL) was added to 3-(pyridin-2-yl)benzoic acid (1.69 g, 8.5 mmol) and the mixture was stirred under reflux overnight. The solvent was evaporated under reduced pressure and the residue was dried in vacuum to give 3-(pyridin-2-yl)benzoyl chloride. 1.66 g of crude product was obtained. To a solution of methyl 3-amino-2-hydroxybenzoate (0.84 g, 5 mmol) and pyridine (790 mg, 10 mmol) in toluene (50 mL) were added crude 3-(pyridin-2-yl)benzoyl chloride (1.6 g, 7.37 mmol) portion-wise at 0° C. and then stirred at 70° C. for 4 h. The resulting mixture was extracted with ethyl acetate (100 mL×4), the organic phase was washed with water and saturated sodium bicarbonate, dried with anhydrous sodium sulfate and evaporated under reduced pressure to obtain yellow solid of methyl 2-hydroxy-3-(3-(pyridin-2-yl)benzamido)benzoate (1.48 g, yield 85%). LC-MS (ESI) m/z: 349 (M+1)+.

Workup

extractionThe resulting mixture was extracted with ethyl acetate (100 mL×4)
washthe organic phase was washed with water and saturated sodium bicarbonate
dry with materialdried with anhydrous sodium sulfate
customevaporated under reduced pressure

Sources & evidence

ORD record: ord-841239aad5e8499bb53b74ca5b84b433
Source dataset: uspto-grants-2012_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08088760B2

Reaction notes

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