Sodium hydride → Ethyl 3-(2-bromo-3,4,5,6-tetramethoxyphenyl)-2-ethoxycarbonyl-2-[3-(4-ethoxycarbonylphenoxy)propyl]propionate

HRID 2268484Notes

Reaction equation

HRID 2268484 reaction equation
[CH2:1]([O:3][C:4]([CH:6]([CH2:12][CH2:13][CH2:14][O:15][C:16]1[CH:21]=[CH:20][C:19]([C:22]([O:24][CH2:25][CH3:26])=[O:23])=[CH:18][CH:17]=1)[C:7]([O:9][CH2:10][CH3:11])=[O:8])=[O:5])[CH3:2].[H-].[Na+].[Br:29][C:30]1[C:35]([CH2:36]Br)=[C:34]([O:38][CH3:39])[C:33]([O:40][CH3:41])=[C:32]([O:42][CH3:43])[C:31]=1[O:44][CH3:45]>CN(C=O)C.O>[Br:29][C:30]1[C:31]([O:44][CH3:45])=[C:32]([O:42][CH3:43])[C:33]([O:40][CH3:41])=[C:34]([O:38][CH3:39])[C:35]=1[CH2:36][C:6]([C:7]([O:9][CH2:10][CH3:11])=[O:8])([CH2:12][CH2:13][CH2:14][O:15][C:16]1[CH:17]=[CH:18][C:19]([C:22]([O:24][CH2:25][CH3:26])=[O:23])=[CH:20][CH:21]=1)[C:4]([O:3][CH2:1][CH3:2])=[O:5]

Participants

6

Reactant 3

HCID 24758Sodium hydrideHCID 18348516Ethyl 2-ethoxycarbonyl-5-(4-ethoxycarbonylphenoxy)pentanoateHCID 183486201-Bromo-6-bromomethyl-2,3,4,5-tetramethoxybenzene

Product 1

HCID 18348578Ethyl 3-(2-bromo-3,4,5,6-tetramethoxyphenyl)-2-ethoxycarbonyl-2-[3-(4-ethoxycarbonylphenoxy)propyl]propionateYield 91.9%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent2×

Procedure

To a solution of ethyl 2-ethoxycarbonyl-5-(4-ethoxycarbonylphenoxy)pentanoate (25.9 g) in DMF (200 ml) was portionwise added sodium hydride (60% oil dispersion, 3.11 g) with cooling with ice. The reaction mixture was allowed to warm to room temperature and stirred for 30 min. To the reaction mixture was dropwise added a solution of 1-bromo-6-bromomethyl-2,3,4,5-tetramethoxybenzene (28.8 g) in DMF (50 ml) with cooling with ice. The reaction mixture was allowed to warm to room temperature and stirred for 6 hr. The reaction mixture was diluted with water and extracted with diethyl ether. The organic layer was washed with water and saturated aqueous sodium chloride and dried. The solvent was removed in vacuo. The residue was purified by silica gel column chromatography (hexane to hexane:ethyl acetate=7:1) to yield the entitled compound (42.6 g) as an oil.

Workup

  1. temperaturewith cooling with ice
  2. temperaturewith cooling with ice
  3. temperatureto warm to room temperature
  4. stirringstirred for 6 hr
  5. extractionextracted with diethyl ether
  6. washThe organic layer was washed with water and saturated aqueous sodium chloride
  7. customdried
  8. customThe solvent was removed in vacuo
  9. customThe residue was purified by silica gel column chromatography (hexane to hexane:ethyl acetate=7:1)

Sources & evidence

ORD record
ord-5ba8861c6fef4141be1bde60624f5c67
Source dataset
uspto-grants-2001_12
Patent number
US06326369B1

Reaction notes

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