Ethyl Acetate → ethyl {3-[1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazol-4-yl]phenyl}acetate

HRID 2283492Notes

Reaction equation

Br[C:2]1[CH:3]=[N:4][N:5]([CH:7]2[CH2:12][CH2:11][CH2:10][CH2:9][O:8]2)[CH:6]=1.CC1(C)C(C)(C)OB([C:21]2[CH:22]=[C:23]([CH2:27][C:28]([O:30][CH2:31][CH3:32])=[O:29])[CH:24]=[CH:25][CH:26]=2)O1.C(=O)([O-])[O-].[Na+].[Na+].C(OCC)(=O)C>O1CCOCC1.O.C1C=CC(P([C]2[CH][CH][CH][CH]2)C2C=CC=CC=2)=CC=1.C1C=CC(P([C]2[CH][CH][CH][CH]2)C2C=CC=CC=2)=CC=1.Cl[Pd]Cl.[Fe]>[O:8]1[CH2:9][CH2:10][CH2:11][CH2:12][CH:7]1[N:5]1[CH:6]=[C:2]([C:25]2[CH:24]=[C:23]([CH2:27][C:28]([O:30][CH2:31][CH3:32])=[O:29])[CH:22]=[CH:21][CH:26]=2)[CH:3]=[N:4]1

Participants

Conditions

Temperature: 80 °C

Procedure

A mixture of 4-bromo-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazole (5 g, 21.6 mmol), ethyl [3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]acetate (6.5 g, 22.7 mmol), sodium carbonate (7 g, 64.8 mmol) and [1,1-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (0.513 g, 0.648 mmol) in dioxane (60 mL) and water (30 mL) was stirred at 80° C. for 14 hours. After allowing to cool to room temperature, ethyl acetate and water were added to the mixture, and the resultant mixture was filtered. The organic layer was separated, washed with brine, dried over Na2SO4, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography to afford ethyl {3-[1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazol-4-yl]phenyl}acetate as an oil.

Workup

temperatureto cool to room temperature
filtrationthe resultant mixture was filtered
customThe organic layer was separated
washwashed with brine
dry with materialdried over Na2SO4
concentrationconcentrated under reduced pressure
customThe residue was purified by silica gel column chromatography

Sources & evidence

ORD record: ord-495f013eb1e94076b94720a400f687f2
Source dataset: uspto-grants-2015_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09145391B2

Reaction notes

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