Phosphorus oxychloride → 4-(5-((E)-2-(4-(2-chlorophenyl)-5-(4-(methylsulfonyl)phenyl)-4H-1,2,4-triazol-3-yl)vinyl)-1,3,4-oxadiazol-2-yl)-2-methoxypyridine

Participants

Reaction Steps

To a suspension of (Z)-4-(2-methoxypyridine-4-carboamido)-4-oxobut-2-enoic acid 9 (180 mg, 0.68 mmol) in 20 mL of PhMe was added 0.2 mL of POCl3. The mixture was stirred at reflux for 2 hours. After removal of solvent, the residue was dissolved in 20 mL of THF and 220 mg (0.68 mmol) of N-amino-N′-(2-chlorophenyl)-4-methylsulfonyl-benzamidine 5 added. The mixture was stirred at ambient temperature for 18 hours. After removal of solvent, the residue was purified by column (0-5% of methanol in dichloromethane) to give 4-(5-((E)-2-(4-(2-chlorophenyl)-5-(4-(methylsulfonyl)phenyl)-4H-1,2,4-triazol-3-yl)vinyl)-1,3,4-oxadiazol-2-yl)-2-methoxypyridine as a solid. Yield: 30 mg, 8.3%.

Provenance & Evidence