Pyridine → 3-fluoro-N-[4-chloro-2-hydroxy-5-trifluoromethylphenyl]isonicotinamide

HRID 884968Notes

Reaction equation

[NH2:1][C:2]1[CH:7]=[C:6]([C:8]([F:11])([F:10])[F:9])[C:5]([Cl:12])=[CH:4][C:3]=1[OH:13].[F:14][C:15]1[CH:23]=[N:22][CH:21]=[CH:20][C:16]=1[C:17](O)=[O:18].CCN=C=NCCCN(C)C.N1C=CC=CC=1>O>[F:14][C:15]1[CH:23]=[N:22][CH:21]=[CH:20][C:16]=1[C:17]([NH:1][C:2]1[CH:7]=[C:6]([C:8]([F:9])([F:10])[F:11])[C:5]([Cl:12])=[CH:4][C:3]=1[OH:13])=[O:18]

Participants

Conditions

Temperature: 80 °C

Procedure

A mixture of 2.0 g of 2-amino-5-chloro-4-trifluoromethylphenol, 1.33 g of 3-fluoroisonicotinic acid, 2.36 g of WSC and 15 ml of pyridine was stirred while heating at 80° C. for 3.5 hours. The reaction mixture was cooled to room temperature, and then water was added, followed by extraction with ethyl acetate three times. The combined organic layers were washed with water and a saturated sodium chloride solution, then dried over anhydrous magnesium sulfate, and then concentrated under reduced pressure. The residue was subjected to silica gel column chromatography to give 2.08 g of 3-fluoro-N-[4-chloro-2-hydroxy-5-trifluoromethylphenyl]isonicotinamide.

Workup

temperatureThe reaction mixture was cooled to room temperature
extractionfollowed by extraction with ethyl acetate three times
washThe combined organic layers were washed with water
dry with materiala saturated sodium chloride solution, then dried over anhydrous magnesium sulfate
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-91425b2f46f94b0b98d16a08ff602628
Source dataset: uspto-grants-2012_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08242133B2

Reaction notes

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