2-(Tributylstannyl)furan → HCID 9881902, compound

HRID 399497Notes

Reaction equation

HRID 399497 reaction equation
Br[C:2]1[CH:12]=[C:11]([C:13]([CH3:16])([CH3:15])[CH3:14])[C:5]2[O:6][CH2:7][C:8]([CH3:10])([CH3:9])[C:4]=2[CH:3]=1.C([Sn](CCCC)(CCCC)[C:22]1[O:23][CH:24]=[CH:25][CH:26]=1)CCC>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.C1(C)C=CC=CC=1>[C:13]([C:11]1[C:5]2[O:6][CH2:7][C:8]([CH3:10])([CH3:9])[C:4]=2[CH:3]=[C:2]([C:22]2[O:23][CH:24]=[CH:25][CH:26]=2)[CH:12]=1)([CH3:16])([CH3:15])[CH3:14]

Participants

5

Reactant 2

HCID 43936882-(Tributylstannyl)furanHCID 107793125-Bromo-7-tert-butyl-2,3-dihydro-3,3-dimethylbenzo[b]furan

Product 1

HCID 9881902HCID 9881902, compoundYield 43.5%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 1140TolueneSolvent

Procedure

A mixture of 5-bromo-7-tert-butyl-2,3-dihydro-3,3-dimethylbenzo[b]furan (1.13 g, 4.0 mmol), 2-(tributylstannyl)furan (1.71 g, 4.8 mmol), tetrakis(triphenylphosphine)palladium (0.46 g, 0.4 mmol), and 20 mL of toluene is heated under argon at reflux for 30 min. The reaction mixture is cooled to room temperature, concentrated in vacuo, diluted with ether, washed with 10% aqueous ammonium hydroxide solution and with brine, dried over anhydrous magnesium sulfate, and concentrated to give a dark oil. Purification by flash column chromatography on silica gel (1% ethyl acetate-hexane) yields about 0.47 g (43%) of the title compound as a light yellow oil.

Workup

  1. temperatureis heated under argon
  2. temperatureat reflux for 30 min
  3. concentrationconcentrated in vacuo
  4. additiondiluted with ether
  5. washwashed with 10% aqueous ammonium hydroxide solution and with brine
  6. dry with materialdried over anhydrous magnesium sulfate
  7. concentrationconcentrated
  8. customto give a dark oil
  9. customPurification by flash column chromatography on silica gel (1% ethyl acetate-hexane)

Sources & evidence

ORD record
ord-93fe670ad34e4eeeb3a66a84f1482aa1
Source dataset
uspto-grants-1998_10
Patent number
US05821250

Reaction notes

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