Benzo(B)Thiophene-2-Boronic Acid → HCID 58762262, compound

HRID 1453003Notes

Reaction equation

HRID 1453003 reaction equation
[S:1]1[C:5](B(O)O)=[CH:4][C:3]2[CH:9]=[CH:10][CH:11]=[CH:12][C:2]1=2.[Br:13][C:14]1[CH:19]=[CH:18][C:17](I)=[C:16]([F:21])[CH:15]=1.C([O-])(O)=O.[Na+]>COCCOC.O.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[Br:13][C:14]1[CH:19]=[CH:18][C:17]([C:5]2[S:1][C:2]3[CH:12]=[CH:11][CH:10]=[CH:9][C:3]=3[CH:4]=2)=[C:16]([F:21])[CH:15]=1

Participants

7

Reactant 3

HCID 2359Benzo(B)Thiophene-2-Boronic AcidHCID 516892Sodium BicarbonateHCID 27245164-Bromo-2-fluoro-1-iodobenzene

Product 1

HCID 58762262HCID 58762262, compoundYield 13%

Reagents, catalysts & solvents 3

HCID 178418476HCID 178418476, compoundCatalystHCID 962WaterSolventHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
80 °C

Procedure

A mixture of Benzo[b]thiophene-2-boronic acid (0.71 g, 4 mmol), 1-bromo-3-fluoro-4-iodobenzene (1 g, 3.3 mmol), bis(triphenylphospine)palladium(II) chloride (46 mg, 2 mol %), NaHCO3 (0.83 g, 9.9 mmol) in DME (4 mL) and H2O (4 mL) was heated to 80° C. under N2 for 72 h. The reaction mixture was partitioned between 1N HCl and EtOAc. The organic layer was washed with saturated NaHCO3, brine, dried over Na2SO4 and concentrated. The residue was purified by silica gel chromatography (hexanes) to give the title compound as a white solid (0.13 g, 13%). 1H NMR (CDCl3): δ 7.33-7.41 (m, 4H), 7.57 (m, 1H), 7.72 (s, 1H), 1.80-7.86 (m, 2H).

Workup

  1. customThe reaction mixture was partitioned between 1N HCl and EtOAc
  2. washThe organic layer was washed with saturated NaHCO3, brine
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated
  5. customThe residue was purified by silica gel chromatography (hexanes)

Sources & evidence

ORD record
ord-2696564d4b9449b688aa35f41a029144
Source dataset
uspto-grants-2009_01
Patent number
US07473790B2

Reaction notes

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