Sodium Carbonate → tert-butyl (E)-4-[3-(6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl)allyl]piperidine-1-carboxylate

HRID 1750002Notes

Reaction equation

HRID 1750002 reaction equation
CC1(C)C(C)(C)OB(/[CH:9]=[CH:10]/[CH2:11][CH:12]2[CH2:17][CH2:16][N:15]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[CH2:14][CH2:13]2)O1.I[C:27]1[C:35]2[O:34][CH2:33][C:32](=[O:36])[C:31]=2[CH:30]=[CH:29][C:28]=1[O:37][CH3:38].C(=O)([O-])[O-].[Na+].[Na+]>O1CCOCC1.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>[CH3:38][O:37][C:28]1[CH:29]=[CH:30][C:31]2[C:32](=[O:36])[CH2:33][O:34][C:35]=2[C:27]=1/[CH:9]=[CH:10]/[CH2:11][CH:12]1[CH2:13][CH2:14][N:15]([C:18]([O:20][C:21]([CH3:22])([CH3:23])[CH3:24])=[O:19])[CH2:16][CH2:17]1

Participants

6

Reactant 3

HCID 10340Sodium CarbonateHCID 712788737-iodo-6-methoxybenzofuran-3(2H)-oneHCID 86682085tert-Butyl (E)-4-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)allyl)piperidine-1-carboxylate

Product 1

HCID 86682086tert-butyl (E)-4-[3-(6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl)allyl]piperidine-1-carboxylateYield 16.1%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 312751,4-DioxaneSolvent

Procedure

A solution of tert-butyl (E)-4-[3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)allyl]piperidine-1-carboxylate (0.176 g, 0.501 mmol) in 1,4-dioxane (5 mL) was added with 7-iodo-6-methoxybenzofuran-3(2H)-one (0.145 g, 0.501 mmol) synthesized in Example B46, Step 2, 2 M aqueous sodium carbonate (0.750 mL, 1.50 mmol) and tetrakis(triphenylphosphine)palladium (0.0579 g, 0.0501 mmol), and the mixture was refluxed for 12 hours by heating. The reaction mixture was cooled to room temperature, concentrated, and added with water, and then the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over anhydrous magnesium sulfate, and then the solvent was evaporated. The residue was purified by silica gel column chromatography (hexane/ethyl acetate) to obtain tert-butyl (E)-4-[3-(6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl)allyl]piperidine-1-carboxylate (0.0313 g, 16%).

Workup

  1. temperaturethe mixture was refluxed for 12 hours
  2. temperatureby heating
  3. concentrationconcentrated
  4. additionadded with water
  5. extractionthe mixture was extracted with ethyl acetate
  6. washThe organic layer was washed with saturated brine
  7. dry with materialdried over anhydrous magnesium sulfate
  8. customthe solvent was evaporated
  9. customThe residue was purified by silica gel column chromatography (hexane/ethyl acetate)

Sources & evidence

ORD record
ord-ddc1156d22d143a0a04cd0b9dda7b75d
Source dataset
uspto-grants-2015_10
Patent number
US09156827B2

Reaction notes

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