Reaktion #165779

Reaktionsgleichung

NaHCO3

3-amino-N′-(benzoyloxy)-6-bromopyrazine-2-carboximidamide

→

5-bromo-3-(5-phenyl-1,2,4-oxadiazol-3-yl)pyrazin-2-amine

Ausbeute 76.0%

Lösungsmittel

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturto cool to RT
2. 2
   SonstigeThe resulting precipitate was isolated by filtration
3. 3
   Sonstigedried (643 mg, 76% Yield)

Vorschrift

3-amino-N′-(benzoyloxy)-6-bromopyrazine-2-carboximidamide (890 mg, 2.648 mmol) and polyphosphonic acid (3.560 mL) were mixed and the reaction heated to 70° C. Further polyphosphonic acid (8.900 mL) was added and the reaction allowed to stir for a further 3 hours at 70° C. The mixture was then allowed to cool to RT, diluted with water and neutralised by the portionwise addition of solid NaHCO3. The resulting precipitate was isolated by filtration and dried (643 mg, 76% Yield). 1H NMR (400.0 MHz, DMSO) d 7.49 (2H, br s), 7.69 (2H, m), 7.77 (1H, m), 8.28 (2H, m), 8.43 (1H, s); MS (ES+) 319.89

Quelle