2-(4-Nitrophenoxy)propionic acid 2-[2-(4-nitrophenoxy)propionyloxy]ethyl ester → 2-(4-Aminophenoxy)-propionic acid 2-[2-(4-aminophenoxy)-propionyloxy]-ethyl ester

HRID 638738Notes

Reaction equation

HRID 638738 reaction equation
[N+:1]([C:4]1[CH:32]=[CH:31][C:7]([O:8][CH:9]([CH3:30])[C:10]([O:12][CH2:13][CH2:14][O:15][C:16](=[O:29])[CH:17]([O:19][C:20]2[CH:25]=[CH:24][C:23]([N+:26]([O-])=O)=[CH:22][CH:21]=2)[CH3:18])=[O:11])=[CH:6][CH:5]=1)([O-])=O.[H][H]>CN(C)C=O.[Pd]>[NH2:26][C:23]1[CH:24]=[CH:25][C:20]([O:19][CH:17]([CH3:18])[C:16]([O:15][CH2:14][CH2:13][O:12][C:10](=[O:11])[CH:9]([O:8][C:7]2[CH:6]=[CH:5][C:4]([NH2:1])=[CH:32][CH:31]=2)[CH3:30])=[O:29])=[CH:21][CH:22]=1

Participants

5

Reactant 2

HCID 592539622-(4-Nitrophenoxy)propionic acid 2-[2-(4-nitrophenoxy)propionyloxy]ethyl esterHCID 178418361HCID 178418361, compound

Product 1

HCID 497643642-(4-Aminophenoxy)-propionic acid 2-[2-(4-aminophenoxy)-propionyloxy]-ethyl esterYield 72.1%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 6228DimethylformamideSolvent

Procedure

2-(4-nitrophenoxy)propionic acid-2-[2-(4-nitrophenoxy)propionyloxy]ethyl ester 49 (50 g, 89.3 mmol) was dissolved in dry dimethylformamide (400 ml) in a pressure vessel, palladium on carbon (5%, 12.5 g) added, and the mixture stirred under an atm. of hydrogen (4 Kg) for 4 hours. The catalyst was removed by filtration and ice water (3 L) was added to the filtrate. Crude 50 was extracted into ethyl acetate, dried over Na2SO4, distilled and purified by column chromatography on silica gel using chloroform as eluant to give pure 50 (25 g, 58%) as a syrup.

Workup

  1. customThe catalyst was removed by filtration and ice water (3 L)
  2. additionwas added to the filtrate
  3. extractionCrude 50 was extracted into ethyl acetate
  4. dry with materialdried over Na2SO4
  5. distillationdistilled
  6. custompurified by column chromatography on silica gel

Sources & evidence

ORD record
ord-442f67c043b341f38e5ea77e5ff2ad81
Source dataset
uspto-grants-2010_04
Patent number
US07691364B2

Reaction notes

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