Dimethyl malonate → 1,3-Dimethyl 2-(4-bromo-2-nitrophenyl)propanedioate

HRID 63668

Reaktionsgleichung

Reaktionsgleichung von HRID 63668
[C:1]([O:8][CH3:9])(=[O:7])[CH2:2][C:3]([O:5][CH3:6])=[O:4].C([O-])([O-])=O.[K+].[K+].[Br:16][C:17]1[CH:22]=[CH:21][C:20](F)=[C:19]([N+:24]([O-:26])=[O:25])[CH:18]=1>COCCOC.O>[Br:16][C:17]1[CH:22]=[CH:21][C:20]([CH:2]([C:1]([O:8][CH3:9])=[O:7])[C:3]([O:5][CH3:6])=[O:4])=[C:19]([N+:24]([O-:26])=[O:25])[CH:18]=1

Komponenten

6

Edukt 3

HCID 7943Dimethyl malonateHCID 11430Potassium CarbonateHCID 27363284-Bromo-1-fluoro-2-nitrobenzene

Produkt 1

HCID 157405961,3-Dimethyl 2-(4-bromo-2-nitrophenyl)propanedioate

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 80711,2-DimethoxyethaneLösungsmittel

Versuchsvorschrift

To a solution of dimethyl malonate (7.8 mL, 68.2 mmol) in DME (100 mL) at 0° C. was added K2CO3 (12.6 g, 91.0 mmol). The reaction mixture was stirred for 30 min, and then 4-bromo-1-fluoro-2-nitrobenzene (10.0 g, 45.5 mmol) was added. The reaction mixture stirred at 40° C. overnight. The reaction was cooled, diluted with water (200 mL), and extracted with EtOAc (100 mL×3). The combined organic layers were washed with brine (100 mL), dried (Na2SO4) and concentrated. The residue was triturated with PE:EtOAc=8:1 (30 mL) to 13.0 g (86%) of the title compound as a yellow solid. [M+H] Calc'd for C11H10BrNO6, 332, 334. Found, 332, 334.

Aufarbeitung

  1. stirringThe reaction mixture stirred at 40° C. overnight
  2. temperatureThe reaction was cooled
  3. extractionextracted with EtOAc (100 mL×3)
  4. washThe combined organic layers were washed with brine (100 mL)
  5. dry with materialdried (Na2SO4)
  6. concentrationconcentrated
  7. customThe residue was triturated with PE

Quellen und Nachweise

ORD-Eintrag
ord-fd035b322cdf4f62b5b9261220c761a8
Quelldatensatz
uspto-grants-2016_09
Patentnummer
US09447046B2

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