Diethyl Malonate → Diethyl isopentylmalonate

HRID 1768924Notes

Reaction equation

HRID 1768924 reaction equation
[Na].[C:2]([O:10][CH2:11][CH3:12])(=[O:9])[CH2:3][C:4]([O:6][CH2:7][CH3:8])=[O:5].[O-]CC.[Na+:16].[CH2:17](Br)[CH2:18][CH:19]([CH3:21])[CH3:20]>C(O)C>[O-:5][CH2:4][CH3:3].[Na+:16].[CH2:17]([CH:3]([C:4]([O:6][CH2:7][CH3:8])=[O:5])[C:2]([O:10][CH2:11][CH3:12])=[O:9])[CH2:18][CH:19]([CH3:21])[CH3:20]

Participants

7

Reactant 4

HCID 7761Diethyl MalonateHCID 78911-Bromo-3-methylbutaneHCID 2723922Sodium ethoxideHCID 5360545Sodium

Product 2

HCID 79384Diethyl isopentylmalonateHCID 2723922Sodium ethoxide

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent2×

Procedure

Sodium ethoxide was prepared from sodium metal (9.1 g) and freshly distilled absolute ethanol (250 ml). Diethyl malonate (63.5 g) was added to sodium ethoxide in ethanol, and the mixture was stirred at 60°-70° C. for 50 min. Isoamyl bromide (60 g) was added, and the reaction mixture was heated under reflux overnight. After the usual work-up, the resulting crude product was distilled under reduced pressure to give diethyl isoamylmalonate. Yield: 71.7 g (78%).

Workup

  1. temperaturethe reaction mixture was heated
  2. temperatureunder reflux overnight
  3. distillationAfter the usual work-up, the resulting crude product was distilled under reduced pressure

Sources & evidence

ORD record
ord-b23e006fd3934b5992f22cc1f125e15c
Source dataset
uspto-grants-1995_01
Patent number
US05380709

Reaction notes

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