Sodium hydride → 2-Bromo-3-[3-(tetrahydropyran-2-yloxy)propoxy]benzaldehyde

HRID 339618Notes

Reaction equation

HRID 339618 reaction equation
[Br:1][C:2]1[C:9]([OH:10])=[CH:8][CH:7]=[CH:6][C:3]=1[CH:4]=[O:5].Br[CH2:12][CH2:13][CH2:14][O:15][CH:16]1[CH2:21][CH2:20][CH2:19][CH2:18][O:17]1.[H-].[Na+]>CN(C=O)C>[Br:1][C:2]1[C:9]([O:10][CH2:12][CH2:13][CH2:14][O:15][CH:16]2[CH2:21][CH2:20][CH2:19][CH2:18][O:17]2)=[CH:8][CH:7]=[CH:6][C:3]=1[CH:4]=[O:5]

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 27779882-(3-Bromopropoxy)tetrahydro-2H-pyranHCID 37146742-Bromo-3-hydroxybenzaldehyde

Product 1

HCID 574292492-Bromo-3-[3-(tetrahydropyran-2-yloxy)propoxy]benzaldehydeYield 102%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 2-bromo-3-hydroxybenzaldehyde (5.18 g, 25.0 mmol) and 2-(3-bromopropoxy)tetrahydro-2H-pyran (5.1 mL, 30 mmol) in DMF (60 mL) was added sodium hydride (1.20 g, 30.0 mmol) at 0° C. under nitrogen atmosphere, and the mixture was stirred at room temperature for overnight. The reaction was quenched with water, and the mixture was extracted with ethyl acetate. The organic layer was washed with water twice and brine, and dried on anhydrous sodium sulfate. The solvent was removed under reduced pressure, and the residue was purified by silica gel column chromatography (9:1 to 3:1 hexane/ethyl acetate) to give 2-bromo-3-[3-(tetrahydropyran-2-yloxy)propoxy]benzaldehyde (8.75 g, quantitative).

Workup

  1. customThe reaction was quenched with water
  2. extractionthe mixture was extracted with ethyl acetate
  3. washThe organic layer was washed with water twice
  4. dry with materialbrine, and dried on anhydrous sodium sulfate
  5. customThe solvent was removed under reduced pressure
  6. customthe residue was purified by silica gel column chromatography (9:1 to 3:1 hexane/ethyl acetate)

Sources & evidence

ORD record
ord-8df62a3a8b0f4649865312acb2fcbbda
Source dataset
uspto-grants-2014_11
Patent number
US08895534B2

Reaction notes

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