Potassium Carbonate → 2-(4-Bromo-3,4,4-trifluorobutylthio)thiazole

HRID 725003Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 725003
[SH:1][C:2]1[S:3][CH:4]=[CH:5][N:6]=1.[Br:7][C:8]([F:15])([F:14])[CH:9]([F:13])[CH2:10][CH2:11]Br.C(=O)([O-])[O-].[K+].[K+]>CC(C)=O>[Br:7][C:8]([F:15])([F:14])[CH:9]([F:13])[CH2:10][CH2:11][S:1][C:2]1[S:3][CH:4]=[CH:5][N:6]=1

Komponenten

5

Edukt 3

HCID 11430Potassium CarbonateHCID 27834041,4-Dibromo-1,1,2-trifluorobutaneHCID 178527881HCID 178527881, Verbindung

Produkt 1

HCID 218505172-(4-Bromo-3,4,4-trifluorobutylthio)thiazoleAusbeute 96,5 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 180AcetoneLösungsmittel

Versuchsvorschrift

2-Mercaptothiazole (11.7 g) in acetone (30 cm3) containing 1,4-dibromo-1,1,2-trifluorobutane (27.0 g) was treated portionwise with anhydrous potassium carbonate (13.8 g) under an atmosphere of nitrogen. The reaction was stirred for 1.5 hours, filtered and the insolubles washed with further acetone (4×25 cm3). The filtrate was evaporated under reduced pressure and the residue fractionated by chromatography (silica, eluant 10% ethyl acetate in hexane) to give 2-(4-bromo-3,4,4-trifluorobutylthio)thiazole (29.5 g). 1H NMR: δ 2.2-2.5(2H,m); 3.2-3.6(2H,m); 4.7-5.0(1H,m); 7.23(1H,d); 7.68(1H,d).

Aufarbeitung

  1. filtrationfiltered
  2. washthe insolubles washed with further acetone (4×25 cm3)
  3. customThe filtrate was evaporated under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-095f3b197e044ad49d2a696423a78f70
Quelldatensatz
uspto-grants-1998_01
Patentnummer
US05705516

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