4-Nitrobenzaldehyde → Methyl 2-(methyl(4-nitrobenzyl)amino)acetate

HRID 1387992Notes

Reaction equation

HRID 1387992 reaction equation
[N+:1]([C:4]1[CH:11]=[CH:10][C:7]([CH:8]=O)=[CH:6][CH:5]=1)([O-:3])=[O:2].Cl.[CH3:13][O:14][C:15](=[O:19])[CH2:16][NH:17][CH3:18].C(N(CC)CC)C.O>ClCCCl>[CH3:13][O:14][C:15](=[O:19])[CH2:16][N:17]([CH2:8][C:7]1[CH:10]=[CH:11][C:4]([N+:1]([O-:3])=[O:2])=[CH:5][CH:6]=1)[CH3:18]

Participants

6

Reactant 4

HCID 5414-NitrobenzaldehydeHCID 962WaterHCID 8471TriethylamineHCID 83544Glycine, N-methyl-, methyl ester, hydrochloride (1:1)

Product 1

HCID 18472662Methyl 2-(methyl(4-nitrobenzyl)amino)acetateYield 80.2%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

In 1,2-dichloroethane (50 ml) were suspended p-nitro-benzaldehyde (5 g), sarcosine methyl ester hydrochloride (4.6 g) and triethylamine (4.6 ml), and to the mixture was added, under ice-cooling, triacetoxy sodium boron hydride (9.8 g). Under nitrogen atmosphere, the mixture was stirred at room temperature for 4 hours. To the mixture was added water, and the mixture was concentrated, neutralized with sodium hydroxide solution and extracted with ethyl acetate. The organic layer was washed with water and brine, and dried with anhydrous magnesium sulfate. Under reduced pressure, the solvent was evaporated, and the residue was purified with silica gel column (ethyl acetate/hexane) to give N-(4-nitrobenzyl)sarcosine methyl ester (6.3 g) as colorless oil.

Workup

  1. additionto the mixture was added, under ice-
  2. temperaturecooling
  3. concentrationthe mixture was concentrated
  4. extractionextracted with ethyl acetate
  5. washThe organic layer was washed with water and brine
  6. dry with materialdried with anhydrous magnesium sulfate
  7. customUnder reduced pressure, the solvent was evaporated
  8. customthe residue was purified with silica gel column (ethyl acetate/hexane)

Sources & evidence

ORD record
ord-4f25089bad3c49899f3475b603ec3216
Source dataset
uspto-grants-2001_07
Patent number
US06268354B1

Reaction notes

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