Réaction #48558

Équation de réaction

Trifluoroacetic acid

4-chloroaniline

4-(5-methyl-1,3,4-oxadiazol-2-yl)benzonitrile

→

title compound

4-[4-(4-Chlorophenyl)-5-methyl-4H-1,2,4-triazol-3-yl]benzonitrile

Solvants

tetrahydrofuran

Conditions de réaction

Traitement

1. 1
   Températurethe reaction was heated
2. 2
   Températureat reflux for 22 hours
3. 3
   AutreThe cooled mixture was partitioned between ethyl acetate (300 mL) and 20% aqueous 0.88 ammonia (120 mL)
4. 4
   Autrethe layers were separated
5. 5
   SéchageThe organic phase was dried over MgSO4
6. 6
   Autreevaporated under reduced pressure
7. 7
   AutreThe residue was triturated with ether

Mode opératoire

Trifluoroacetic acid (600 μL, 8.1 mmol) was added to a suspension of 4-chloroaniline (2.1 g, 16.2 mmol) and 4-(5-methyl-1,3,4-oxadiazol-2-yl)benzonitrile (Journal für Praktische Chemie, 1994; 336(8); 678-85) (3.0 g, 16.2 mmol) in tetrahydrofuran (50 mL) and the reaction was heated at reflux for 22 hours. The cooled mixture was partitioned between ethyl acetate (300 mL) and 20% aqueous 0.88 ammonia (120 mL), and then the layers were separated. The organic phase was dried over MgSO4 and evaporated under reduced pressure. The residue was triturated with ether and a minimum volume of ethyl acetate to afford the title compound as a white crystalline solid, 2.82 g.

Source