Sodium Carbonate → 3-Fluoro-4-(2-methylpyridin-4-yl)benzonitrile

HRID 1398230Notes

Reaction equation

[F:1][C:2]1[CH:3]=[C:4]([CH:7]=[CH:8][C:9]=1B1OC(C)(C)C(C)(C)O1)[C:5]#[N:6].Br[C:20]1[CH:25]=[CH:24][N:23]=[C:22]([CH3:26])[CH:21]=1.C(=O)([O-])[O-].[Na+].[Na+]>COCCOC.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>[F:1][C:2]1[CH:3]=[C:4]([CH:7]=[CH:8][C:9]=1[C:20]1[CH:25]=[CH:24][N:23]=[C:22]([CH3:26])[CH:21]=1)[C:5]#[N:6]

Participants

Conditions

Temperature: 80 °C

Procedure

A mixture of 3-fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzonitrile (14.0 g), 4-bromo-2-methylpyridine (5.84 mL), tetrakis(triphenylphosphine)palladium(0) (5.24 g) and 2N aqueous sodium carbonate solution (91 mL) in 1,2-dimethoxyethane (20 mL) was stirred at 80° C. for 30 min under a nitrogen atmosphere. The reaction mixture was allowed to cool to room temperature, and diluted with water, and the mixture was extracted with ethyl acetate. The organic layer was separated, and dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane) to give the title compound (6.41 g).

Workup

temperatureto cool to room temperature
extractionthe mixture was extracted with ethyl acetate
customThe organic layer was separated
dry with materialdried over anhydrous magnesium sulfate
customthe solvent was evaporated under reduced pressure
customThe residue was purified by silica gel column chromatography (ethyl acetate/hexane)

Sources & evidence

ORD record: ord-d6de19823f3a43b6aba066c6378f5aa0
Source dataset: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08901309B2

Reaction notes

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