(4-Nitrophenoxy)-acetic acid-2-[2-(4-nitrophenoxy)-acetoxy]-ethyl ester → (4-Amino-phenoxy)-acetic acid-2-[2-(4-amino-phenoxy)-acetoxy]-ethyl ester

HRID 638732Notes

Reaction equation

HRID 638732 reaction equation
[N+:1]([C:4]1[CH:30]=[CH:29][C:7]([O:8][CH2:9][C:10]([O:12][CH2:13][CH2:14][O:15][C:16](=[O:28])[CH2:17][O:18][C:19]2[CH:24]=[CH:23][C:22]([N+:25]([O-])=O)=[CH:21][CH:20]=2)=[O:11])=[CH:6][CH:5]=1)([O-])=O>CN(C)C=O.[Pd]>[NH2:25][C:22]1[CH:23]=[CH:24][C:19]([O:18][CH2:17][C:16]([O:15][CH2:14][CH2:13][O:12][C:10](=[O:11])[CH2:9][O:8][C:7]2[CH:6]=[CH:5][C:4]([NH2:1])=[CH:30][CH:29]=2)=[O:28])=[CH:20][CH:21]=1

Participants

4

Reactant 1

HCID 59253942(4-Nitrophenoxy)-acetic acid-2-[2-(4-nitrophenoxy)-acetoxy]-ethyl ester

Product 1

HCID 25235089(4-Amino-phenoxy)-acetic acid-2-[2-(4-amino-phenoxy)-acetoxy]-ethyl esterYield 78%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 6228DimethylformamideSolvent

Procedure

(4-nitro-phenoxy)-acetic acid-2-[2-(4-nitrophenoxy) acetoxy]ethyl ester 42 (100 g, 238 mmol) was dissolved in dry dimethylformamide (500 ml) in a pressure vessel, palladium on carbon (5%, 22 g) added, and the mixture stirred under an atmosphere of hydrogen (4 Kg) for 6 hours. The catalyst was removed by filtration and ice water (2.5 L) was added to the filtrate. Crude 43 was filtered off, dried and recrystallised in a mixture of methanol:chloroform (1:1) to give pure 43 (65 g, 78%) as a light brown shining powder. M.p: 124-125.8° C.

Workup

  1. customThe catalyst was removed by filtration and ice water (2.5 L)
  2. additionwas added to the filtrate
  3. filtrationCrude 43 was filtered off
  4. customdried
  5. customrecrystallised in a mixture of methanol:chloroform (1:1)

Sources & evidence

ORD record
ord-151481d169464f40933e4cdcd9bf75dd
Source dataset
uspto-grants-2010_04
Patent number
US07691364B2

Reaction notes

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