Réaction #165779

Équation de réaction

NaHCO3

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

→

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

Rendement 76.0%

Solvants

water

Conditions de réaction

Traitement

1. 1
   Températureto cool to RT
2. 2
   AutreThe resulting precipitate was isolated by filtration
3. 3
   Autredried (643 mg, 76% Yield)

Mode opératoire

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

Source