Azobisisobutyronitrile → 5-(Bromomethyl)thiophene-2-carbonitrile

HRID 1263422

Reaktionsgleichung

Reaktionsgleichung von HRID 1263422
[C:1]([C:3]1[S:4][C:5]([CH3:8])=[CH:6][CH:7]=1)#[N:2].[Br:9]N1C(=O)CCC1=O.N(C(C)(C)C#N)=NC(C)(C)C#N>C(Cl)(Cl)(Cl)Cl>[C:1]([C:3]1[S:4][C:5]([CH2:8][Br:9])=[CH:6][CH:7]=1)#[N:2]

Komponenten

5

Edukt 3

HCID 6547AzobisisobutyronitrileHCID 67184N-bromobutanimideHCID 3127335-Methylthiophene-2-carbonitrile2×

Produkt 1

HCID 105600165-(Bromomethyl)thiophene-2-carbonitrileAusbeute 92,8 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 5943Carbon TetrachlorideLösungsmittel

Versuchsvorschrift

A solution of 2-cyano-5-methylthiophene (compound 22, 3.0 g, 24 mmol), N-bromosuccinimide (Aldrich, 4.8 g, 27 mmol), and 2,2′-azobisisobutyronitrile (Aldrich, 0.4 g, 2.4 mmol) in CCl4 (Aldrich, 60 mL) was heated at reflux for 5 hours. After cooling to ambient temperature, the solvent was removed under vacuum to give a yellow oil. The oil was purified by a flash column chromatography (1:1 hexane/ethyl acetate) to give the title compound (4.5 g, 91%). TLC Rf 0.91 (1:1 of hexane/ethyl acetate); 1HNMR (CDCl3) δ4.66 (s, 2H), 7.10 (d, 1H, J=3.8 Hz), 7.48 (d, 1H, J=3.8 Hz).

Aufarbeitung

  1. temperatureat reflux for 5 hours
  2. customthe solvent was removed under vacuum
  3. customto give a yellow oil
  4. customThe oil was purified by a flash column chromatography (1:1 hexane/ethyl acetate)

Quellen und Nachweise

ORD-Eintrag
ord-50aa8f13aa3643b8a6700938a4322427
Quelldatensatz
uspto-grants-2003_04
Patentnummer
US06541467B1

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