Cesium carbonate → Methyl 4-tert-butyl-2-(6-(trifluoromethyl)pyridin-2-yloxy)benzoate

HRID 1942969Notes

Reaction equation

[C:1]([C:5]1[CH:14]=[CH:13][C:8]([C:9]([O:11][CH3:12])=[O:10])=[C:7]([OH:15])[CH:6]=1)([CH3:4])([CH3:3])[CH3:2].F[C:17]1[CH:22]=[CH:21][CH:20]=[C:19]([C:23]([F:26])([F:25])[F:24])[N:18]=1.C([O-])([O-])=O.[Cs+].[Cs+]>CN(C=O)C.O>[C:1]([C:5]1[CH:14]=[CH:13][C:8]([C:9]([O:11][CH3:12])=[O:10])=[C:7]([O:15][C:17]2[CH:22]=[CH:21][CH:20]=[C:19]([C:23]([F:26])([F:25])[F:24])[N:18]=2)[CH:6]=1)([CH3:4])([CH3:2])[CH3:3]

Participants

Conditions

Temperature: 70 °C

Procedure

A mixture of methyl 4-tert-butyl-2-hydroxybenzoate (0.70 g, 3.4 mmol), 2-fluoro-6-(trifluoromethyl)pyridine (0.55 g, 3.4 mmol), and Cs2CO3 (1.1 g, 3.4 mmol) in DMF (15 mL) was heated at 70° C. for 19 hours. The reaction was diluted with water and extracted with ethyl acetate. The combined extracts were washed with brine and water, dried over sodium sulfate, and evaporated. The residue was purified by column chromatography on silica gel with 0-15% ethyl acetate in hexanes to give methyl 4-tert-butyl-2-(6-(trifluoromethyl)pyridin-2-yloxy)benzoate (0.49 g, 41% yield). LC/MS: m/z 354.3 (M+H)+ at 2.13 min (10%-99% CH3CN (0.035% TFA)/H2O (0.05% TFA)).

Workup

extractionextracted with ethyl acetate
washThe combined extracts were washed with brine and water
dry with materialdried over sodium sulfate
customevaporated
customThe residue was purified by column chromatography on silica gel with 0-15% ethyl acetate in hexanes

Sources & evidence

ORD record: ord-8a106394d4ba45da8640a582456548c3
Source dataset: uspto-grants-2013_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08389734B2

Reaction notes

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