Triethylamine → 2-Fluoro-5-isobutyrylamino-3-(5-methyl-pyridin-2-yl)-benzoic acid methyl ester

HRID 553806Notes

Reaction equation

[CH3:1][O:2][C:3](=[O:19])[C:4]1[CH:9]=[C:8]([NH2:10])[CH:7]=[C:6]([C:11]2[CH:16]=[CH:15][C:14]([CH3:17])=[CH:13][N:12]=2)[C:5]=1[F:18].[C:20](Cl)(=[O:24])[CH:21]([CH3:23])[CH3:22].C(N(CC)CC)C>C(Cl)Cl>[CH3:1][O:2][C:3](=[O:19])[C:4]1[CH:9]=[C:8]([NH:10][C:20](=[O:24])[CH:21]([CH3:23])[CH3:22])[CH:7]=[C:6]([C:11]2[CH:16]=[CH:15][C:14]([CH3:17])=[CH:13][N:12]=2)[C:5]=1[F:18]

Participants

Conditions

Temperature: 0 °C

Procedure

5-Amino-2-fluoro-3-(5-methyl-pyridin-2-yl)-benzoic acid methyl ester (560 mg, 1.9 mmol) was dissolved in 20 mL methylene chloride, and the mixture was cooled to 0° C. Isobutyryl chloride (221 mg, 2.1 mmol) and triethylamine (575 mg, 5.7 mmol) were added, and the mixture was stirred at 0° C. for 30 minutes. The reaction mixture was washed with saturated aqueous NaHCO3 and brine, dried over Na2SO4, filtered and concentrated under reduced pressure to give 690 mg (99%) of 2-fluoro-5-isobutyrylamino-3-(5-methyl-pyridin-2-yl)-benzoic acid methyl ester.

Workup

washThe reaction mixture was washed with saturated aqueous NaHCO3 and brine
dry with materialdried over Na2SO4
filtrationfiltered
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-8e24c4bbb3ca483bbc7d2e0e068864ca
Source dataset: uspto-grants-2011_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08048905B2

Reaction notes

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