Réaction #1121779

Équation de réaction

2-amino-3-bromo-5-phenylpyrazine

2-Amino-3-Bromo-5-phenylpyrazine

2-mercaptobenzothiazol

sodium hydride

→

title compound 18p

Rendement 23.0%

2-Amino-3-(benzo[d]thiazol-2-ylthio)-5-phenylpyrazine

Rendement 23.0%

Solvants

DMF

Conditions de réaction

Traitement

1. 1
   AutreThe solvent was removed under reduced pressure
2. 2
   workup.ADDITIONthe crude was diluted with dichloromethane
3. 3
   Lavagewashed with water
4. 4
   Filtrationfiltered
5. 5
   Autrethe solvent removed under reduced pressure
6. 6
   Autreto get a crude that
7. 7
   Autrewas purified by flash chromatography

Mode opératoire

To a solution of 2-mercaptobenzothiazol (0.07 g, 0.4 mmol) in dry DMF (7 mL), sodium hydride (NaH) (9 mg, 0.4 mmol) was added and the resulting mixture was stirred for 15 min. After this time 2-amino-3-bromo-5-phenylpyrazine 17b (0.05 g, 0.2 mmol) was added and the mixture heated at 110° C. for 4 h. The solvent was removed under reduced pressure and the crude was diluted with dichloromethane, washed with water. Then the organic layer was anidrified over Na2SO4, filtered and the solvent removed under reduced pressure to get a crude that was purified by flash chromatography using dichloromethane-EtOAc (9:1 v/v) to get 15 mg of title compound 18p as a pale yellow solid (yield 23%). 1H-NMR (CDCl3): 5.36 (br s, 2H), 7.28-7.47 (m, 6H), 7.59-7.76 (m, 1H), 7.91-7.93 (m, 2H), 8.53 (s, 1H). MS (ESI): m/z 359 (M+Na1).

Source