Hydrochloric Acid → diethyl(acetylamino)(hexadecyl)propanedioate

HRID 862799Notes

Reaction equation

HRID 862799 reaction equation
[C:1]([NH:4][CH:5]([C:11]([O:13][CH2:14][CH3:15])=[O:12])[C:6]([O:8][CH2:9][CH3:10])=[O:7])(=[O:3])[CH3:2].[O-]CC.[Na+].[CH2:20](Br)[CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH2:33][CH2:34][CH3:35].Cl>C(O)C>[C:1]([NH:4][C:5]([CH2:35][CH2:34][CH2:33][CH2:32][CH2:31][CH2:30][CH2:29][CH2:28][CH2:27][CH2:26][CH2:25][CH2:24][CH2:23][CH2:22][CH2:21][CH3:20])([C:11]([O:13][CH2:14][CH3:15])=[O:12])[C:6]([O:8][CH2:9][CH3:10])=[O:7])(=[O:3])[CH3:2]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 82131-BromohexadecaneHCID 14041Acetamidomalonic acid diethyl esterHCID 2723922Sodium ethoxide

Product 1

HCID 227970diethyl(acetylamino)(hexadecyl)propanedioateYield 71.6%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent2×

Procedure

Diethyl 2-acetamidomalonate (3.0 g) was dissolved in 50 ml of dry ethanol and 1.13 g of sodium ethoxide was added thereto. A solution of 5.5 g of hexadecyl bromide in 20 ml of ethanol was added thereto at room temperature with stirring. The inside of the reaction vessel was displaced with nitrogen and the mixture was refluxed for about 15 hours. The mixture was neutralized with a 1N aqueous hydrochloric acid solution and concentrated. The concentrate was purified by silica gel column chromatography to give 4.37 g of diethyl 2-acetamido-2-hexadecylmalonate.

Workup

  1. temperaturethe mixture was refluxed for about 15 hours
  2. concentrationconcentrated
  3. customThe concentrate was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-8db6e5a74f4e4f3cbccbfcf9fccd953d
Source dataset
uspto-grants-1998_02
Patent number
US05719176

Reaction notes

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