Sodium Carbonate → 2,2,2-Trifluoro-1-[4-(5-fluoropyridin-2-yl)phenyl]ethanone

HRID 216334Notes

Reaction equation

[F:1][C:2]([F:21])([F:20])[C:3]([C:5]1[CH:10]=[CH:9][C:8](B2OC(C)(C)C(C)(C)O2)=[CH:7][CH:6]=1)=[O:4].Br[C:23]1[CH:28]=[CH:27][C:26]([F:29])=[CH:25][N:24]=1.C(=O)([O-])[O-].[Na+].[Na+]>CN(C)C=O.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]>[F:21][C:2]([F:1])([F:20])[C:3]([C:5]1[CH:6]=[CH:7][C:8]([C:23]2[CH:28]=[CH:27][C:26]([F:29])=[CH:25][N:24]=2)=[CH:9][CH:10]=1)=[O:4]

Participants

Conditions

Temperature: 90 °C

Procedure

Pd(dppf)Cl2 (2.5 g, 3.3 mmol) was added to a degassed, ambient temperature solution of 2,2,2-trifluoro-1-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]ethanone (20 g, 67 mmol), 2-bromo-5-fluoropyridine (11.6 g, 67 mmol) and sodium carbonate (12.7 g, 134 mmol) in N,N-dimethylformamide (4400 mL) and water (90 mL). After heating at 90° C. overnight, the reaction mixture was poured into ice (400 g) and extracted with diethyl ether. The combined organic extracts were dried (magnesium sulfate), filtered and concentrated in vacuo. Chromatography over silica eluting with petroleum ether/ethyl acetate (20:1) afforded the title compound.

Workup

extractionextracted with diethyl ether
dry with materialThe combined organic extracts were dried (magnesium sulfate)
filtrationfiltered
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-b30d3b8e4fcc46e4a25fd3fdda072028
Source dataset: uspto-grants-2012_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08193228B2

Reaction notes

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