Toluene → HCID 86675119, compound

HRID 1502800Notes

Reaction equation

HRID 1502800 reaction equation
Br[C:2]1[CH:14]=[CH:13][C:5]([C:6]([O:8][C:9]([CH3:12])([CH3:11])[CH3:10])=[O:7])=[C:4]([Cl:15])[CH:3]=1.C([O-])([O-])=O.[K+].[K+].[C:22]1(C)C=CC=C[CH:23]=1>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>[Cl:15][C:4]1[CH:3]=[C:2]([CH:22]=[CH2:23])[CH:14]=[CH:13][C:5]=1[C:6]([O:8][C:9]([CH3:12])([CH3:11])[CH3:10])=[O:7]

Participants

5

Reactant 3

HCID 1140TolueneHCID 11430Potassium CarbonateHCID 26967600tert-Butyl 4-bromo-2-chlorobenzoate

Product 1

HCID 86675119HCID 86675119, compoundYield 46%

Reagents, catalysts & solvents 1

HCID 178418397HCID 178418397, compoundCatalyst

Procedure

To a stirred solution of tert-butyl 4-bromo-2-chlorobenzoate (1.6 g, 5.50 mmol) in toluene (20 mL) was added tetrakis(triphenylphospine)palladium(O) (Pd(PPh3)4; (0.31 mg, 0.27 mmol), K2CO3 (2.27 g, 16.5 mmol) and vinylboronic anhydride pyridine complex (2.0 g, 8.3 mmol) and the reaction mixture was heated to reflux for 16 h. The reaction mixture was filtered, and the filtrate was washed with water and brine, dried over Na2SO4 and concentrated under reduced pressure. Purification by flash column chromatography (SiO2, 100-200 mesh; eluting with 5-6% EtOAc in n-hexane) afforded the title compound as a liquid (0.6 g, 46%): 1H NMR (400 MHz, CDCl3) δ 7.72 (d, J=8.1 Hz, 1H), 7.44 (m, 1H), 7.31 (d, J=8.0 Hz, 1H), 6.69 (dd, J=17.6, 10.8 Hz, 1H), 5.85 (d, J=17.6 Hz, 1H), 5.40 (d, J=10.8 Hz, 1H), 1.60 (s, 9H); ESIMS m/z 238.95 ([M+H]+); IR (thin film) 2931, 1725, 1134 cm−1.

Workup

  1. temperatureto reflux for 16 h
  2. filtrationThe reaction mixture was filtered
  3. washthe filtrate was washed with water and brine
  4. dry with materialdried over Na2SO4
  5. concentrationconcentrated under reduced pressure
  6. customPurification
  7. washby flash column chromatography (SiO2, 100-200 mesh; eluting with 5-6% EtOAc in n-hexane)

Sources & evidence

ORD record
ord-885883c9fda2453f9a686a53b04d8eb1
Source dataset
uspto-grants-2015_12
Patent number
US09211280B2

Reaction notes

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