反应详情

308 mg (1.0 mmol) of 1-methyl-2-[(4-cyanophenyl)oxymethyl]-5-carboxyimidazo[4,5-b]pyridine were suspended in 5 mL of dimethylformamide and mixed with 303 mg (3.0 mmol) of N-methylmorpholine and 321 mg (1.0 mmol) of O-(benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium tetrafluoroborate. After 10 minutes at room temperature, a solution of 215 mg (1.2 mmol) of methyl N-(2-pyridyl)-3-aminopropionate in 2 mL of dimethylformamide was added, whereupon a clear solution was obtained. After 12 hours at room temperature, the reaction solution was stirred into ice-water. After extracting 3 times with ethyl acetate, the combined organic extracts were washed with a saline solution, dried over sodium sulfate, and evaporated down. The residue obtained was chromatographed on silica gel with dichloromethane/ethanol (90:1 to 25:1). Yield: 165 mg of white powder (35% of theory), C25H12N6O4 (407.50); melting point: 139° C.-140° C.

1. customwas obtained
2. waitAfter 12 hours at room temperature
3. extractionAfter extracting 3 times with ethyl acetate
4. washthe combined organic extracts were washed with a saline solution
5. dry with materialdried over sodium sulfate
6. customevaporated down
7. customThe residue obtained
8. customwas chromatographed on silica gel with dichloromethane/ethanol (90:1 to 25:1)