Water → 6-(4-Bromobenzyl)oxy-2-(N,N-dimethylamino)methyltetralin

HRID 854025Notes

Reaction equation

HRID 854025 reaction equation
[CH3:1][N:2]([CH2:4][CH:5]1[CH2:14][CH2:13][C:12]2[C:7](=[CH:8][CH:9]=[C:10]([OH:15])[CH:11]=2)[CH2:6]1)[CH3:3].[H-].[Na+].[Br:18][C:19]1[CH:26]=[CH:25][C:22]([CH2:23]Br)=[CH:21][CH:20]=1.O>CN(C=O)C>[Br:18][C:19]1[CH:26]=[CH:25][C:22]([CH2:23][O:15][C:10]2[CH:11]=[C:12]3[C:7](=[CH:8][CH:9]=2)[CH2:6][CH:5]([CH2:4][N:2]([CH3:1])[CH3:3])[CH2:14][CH2:13]3)=[CH:21][CH:20]=1

Participants

6

Reactant 4

HCID 962WaterHCID 24758Sodium hydrideHCID 685274-Bromobenzyl bromideHCID 219397642-(N,N-Dimethylamino)methyl-6-hydroxytetralin

Product 1

HCID 183615356-(4-Bromobenzyl)oxy-2-(N,N-dimethylamino)methyltetralinYield 37.3%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent2×

Procedure

2-(N,N-Dimethylamino)methyl-6-hydroxytetralin (5.0 g; obtained in Reference Example 16) was dissolved in DMF (130 ml), to which was added 60% oily sodium hydride (1.46 g) at 0° C. The reaction mixture was warmed to room temperature, and stirred for 1 hour. This was again cooled to 0° C., to which was added a DMF solution (20 ml) of 4-bromobenzyl bromide (10.0 g). The reaction mixture was stirred at room temperature for 2 hours, and water was added thereto, which was then extracted with ethyl acetate. The organic layer was washed with water and a saturated aqueous sodium chloride solution, then dried, and concentrated. The residue was purified by alumina column chromatography (eluent:ethyl acetate/hexane=1/10) to obtain the entitled compound (3.4 g).

Workup

  1. temperatureThis was again cooled to 0° C., to which
  2. stirringThe reaction mixture was stirred at room temperature for 2 hours
  3. extractionwhich was then extracted with ethyl acetate
  4. washThe organic layer was washed with water
  5. dry with materiala saturated aqueous sodium chloride solution, then dried
  6. concentrationconcentrated
  7. customThe residue was purified by alumina column chromatography (eluent:ethyl acetate/hexane=1/10)

Sources & evidence

ORD record
ord-50e0bc4335c04ad38feeaae7af4432df
Source dataset
uspto-grants-2007_08
Patent number
US07256204B2

Reaction notes

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