反应详情

温度

2.5 °C

(74 mg, 266 μmol) 5-Phenylethynyl-pyridine-2-carboxylic acid tert-butylamide (Example 1, step 2) was dissolved in DMF (1 ml) and cooled to 0-5° C. NaH (55%) (14 mg, 319 μmol, 1.2 equiv.) was added and the mixture was stirred for 30 min at 0-5° C. Iodomethane (22 μl, 346 μmol, 1.3 equiv.) was added, and the mixture was then stirred for 1 hour at room temperature. The reaction mixture was evaporated and treated with sat. NaHCO3 solution and extracted twice with a small volume of CH2Cl2. The organic layers were loaded directly to silica gel column and the crude material was purified by flash chromatography on silica gel (20 g, ethyl acetate/heptane gradient, 0:100 to 100:0). The desired 5-phenylethynyl-pyridine-2-carboxylic acid tert-butyl-methyl-amide (48 mg, 62% yield) was obtained as a light yellow solid, MS: m/e=293.0 (M+H+).

1. stirringthe mixture was then stirred for 1 hour at room temperature
2. customThe reaction mixture was evaporated
3. additiontreated with sat. NaHCO3 solution
4. extractionextracted twice with a small volume of CH2Cl2
5. customthe crude material was purified by flash chromatography on silica gel (20 g, ethyl acetate/heptane gradient, 0:100 to 100:0)