Reaktion #1096954

Reaktionsgleichung

2-Bromo-1-(2-methoxy-phenyl)-ethanone

thiourea

→

product

Ausbeute 92.0%

4-(2-Methoxy-phenyl)-thiazol-2-ylamine

Ausbeute 92.0%

Lösungsmittel

ethanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe ethanol was evaporated to dryness
2. 2
   workup.DISSOLUTIONthe crude product was dissolved in a minimum of dichloromethane
3. 3
   ExtraktionThe crude product was then extracted twice with 1M sodium hydroxide and once with a saturated aqueous solution of sodium chloride
4. 4
   TrocknenThe organic layer was then dried over sodium sulfate
5. 5
   Filtrationfiltered
6. 6
   Sonstigeevaporated to dryness

Vorschrift

2-Bromo-1-(2-methoxy-phenyl)-ethanone (0.6388 g, 2.789 mmol) and thiourea (0.2289 g, 3.007 mmol) were dissolved in a 20 mL of ethanol. The reaction mixture was allowed to stir overnight at room temperature. The ethanol was evaporated to dryness and the crude product was dissolved in a minimum of dichloromethane. The crude product was then extracted twice with 1M sodium hydroxide and once with a saturated aqueous solution of sodium chloride. The organic layer was then dried over sodium sulfate, filtered, and evaporated to dryness to yield the pure product (0.529 g, 2.56 mmol, 92.0%). ESI-MS m/z calc. 206.3, found 207.1 (M+1)+ Retention time 1.86 minutes. 1H NMR (400 MHz, CD3CN) δ 3.91 (s, 3H), 5.54 (s, 2H), 6.97-7.02 (m, 1H), 7.03-7.06 (m, 1H), 7.23 (s, 1H), 7.24-7.29 (m, 1H), 8.06 (dd, J=7.8, 1.8 Hz, 1H).

Quelle