Benzoyl Peroxide → Propanedioic acid, (2-bromo-1-methylethylidene)-, diethyl ester

HRID 1517196Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1517196
[C:1](=[C:4]([C:10]([O:12][CH2:13][CH3:14])=[O:11])[C:5]([O:7][CH2:8][CH3:9])=[O:6])([CH3:3])[CH3:2].[Br:15]N1C(=O)CCC1=O.C(OOC(=O)C1C=CC=CC=1)(=O)C1C=CC=CC=1>C(Cl)(Cl)(Cl)Cl>[Br:15][CH2:3][C:1](=[C:4]([C:10]([O:12][CH2:13][CH3:14])=[O:11])[C:5]([O:7][CH2:8][CH3:9])=[O:6])[CH3:2]

Komponenten

5

Edukt 3

HCID 7187Benzoyl PeroxideHCID 67184N-bromobutanimide2×HCID 81255Diethyl isopropylidenemalonate

Produkt 1

HCID 11254458Propanedioic acid, (2-bromo-1-methylethylidene)-, diethyl ester

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 5943Carbon TetrachlorideLösungsmittel2×

Versuchsvorschrift

Diethyl isopropylidenemalonate (4, 50g, 0.25 mol) was refluxed with stirring with N-bromosuccinimide (44.3 g, 0.25 mol) and dibenzoyl peroxide (1.0 g, 4.1 mmol) in carbon tetrachloride (100 mL) with illumination using Kodak Ectagraphic slide projector lamp ELH (300 Watt) for 1.5 h. The reaction was completed as indicated by a negative starch-iodine test for N-bromosuccinimide. The resulting mixture was diluted with carbon tetrachloride (100 mL) and it was cooled in an ice-bath. The precipitated succinimide was filtered off and the filtrate was evaporated in vacuo at room temperature. The residual pale yellow oil of diethyl bromo-isopropylidene-malonate (5, 71.1 g) was used without purification in the Example 2.

Aufarbeitung

  1. customfor 1.5 h
  2. temperaturewas cooled in an ice-bath
  3. filtrationThe precipitated succinimide was filtered off
  4. customthe filtrate was evaporated in vacuo at room temperature
  5. customThe residual pale yellow oil of diethyl bromo-isopropylidene-malonate (5, 71.1 g) was used without purification in the Example 2

Quellen und Nachweise

ORD-Eintrag
ord-d55ac5bb53bc4f0caf556f10c006cee1
Quelldatensatz
uspto-grants-2012_07
Patentnummer
US08232275B2

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