Sodium Carbonate → 7-(3-Fluorophenyl)chroman-4-one

HRID 1847191Notes

Reaction equation

HRID 1847191 reaction equation
Br[C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[O:8][CH2:7][CH2:6][C:5]2=[O:12].[F:13][C:14]1[CH:15]=[C:16](B(O)O)[CH:17]=[CH:18][CH:19]=1.C(=O)([O-])[O-].[Na+].[Na+]>O1CCOCC1.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:13][C:14]1[CH:19]=[C:18]([C:11]2[CH:10]=[C:9]3[C:4]([C:5](=[O:12])[CH2:6][CH2:7][O:8]3)=[CH:3][CH:2]=2)[CH:17]=[CH:16][CH:15]=1

Participants

7

Reactant 3

HCID 10340Sodium CarbonateHCID 27339863-Fluorophenylboronic acidHCID 41974516-bromo-3,4-dihydro-2H-1-benzopyran-4-one

Product 1

HCID 867282147-(3-Fluorophenyl)chroman-4-oneYield 88%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

To a solution of 6-bromo-3,4-dihydro-2H-chromen-4-one (1.5 g, 6.6 mmol), 3-fluorophenylboronic acid (1.39 g, 9.9 mmol) and sodium carbonate (2.1 g, 19.8 mmol) in dioxane (20 mL) and water (1 mL) was added Pd(PPh3)4 (382 mg, 0.3 mmol) at rt. The solution was heated at 100° C. overnight. The reaction was filtered, concentrated, and purified by silica gel chromatography (PE/EtOAc/DCM=10:1:2) to give 1.4 g (88%) of the title compound as a white solid. 1H NMR (300 MHz, CDCl3): δ 2.86 (2H, t, J=6.6 Hz), 4.60 (2H, t, J=6.6 Hz), 7.11-7.14 (1H, m), 7.18 (1H, d, J=1.5 Hz), 7.23-7.29 (2H, m), 7.32-7.45 (2H, m), 7.98 (1H, d, J=8.1 Hz).

Workup

  1. filtrationThe reaction was filtered
  2. concentrationconcentrated
  3. custompurified by silica gel chromatography (PE/EtOAc/DCM=10:1:2)

Sources & evidence

ORD record
ord-ca3a3c7e698f41c5a2b9c35fa9113b65
Source dataset
uspto-grants-2015_02
Patent number
US08952151B2

Reaction notes

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