反应详情

温度

70 °C

A mixture of (5R)-3-(3-fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-5-(4-chloro-1H-1,2,3-triazol-1-ylmethyl)-1,3-oxazolidin-2-one (300 mg, 0.71 mmol), 5-bromo-2-(2-methyl-2H-tetrazol-5-yl)pyridine (170 mg, 0.71 mmol), and sodium carbonate (226 mg, 2.13 mmol) in N,N-dimethylformamide:water (5 mL, 10:1) was degassed, flushed with nitrogen, and treated with tetrakis(triphenylphosphine)palladium (0) (82 mg, 10 mol %). The reaction mixture was heated at 70° C. for 3 hours, cooled to room temperature, and evaporated to dryness under reduced pressure. The involatile residue was purified by chromatography on silica gel [elution with dichloromethane:N,N-dimethylformamide (25:1 to 20:1)]. The product fraction was concentrated to a small volume (˜3 mL) and treated with dichloromethane (5 mL) and hexanes (15 mL) to precipitate the product as a colorless amorphous solid (229 mg, 71%).

1. customwater (5 mL, 10:1) was degassed
2. customflushed with nitrogen
3. additiontreated with tetrakis(triphenylphosphine)palladium (0) (82 mg, 10 mol %)
4. temperaturecooled to room temperature
5. customevaporated to dryness under reduced pressure
6. customThe involatile residue was purified by chromatography on silica gel [elution with dichloromethane:N,N-dimethylformamide (25:1 to 20:1)]
7. concentrationThe product fraction was concentrated to a small volume (˜3 mL)
8. additiontreated with dichloromethane (5 mL) and hexanes (15 mL)
9. customto precipitate the product as a colorless amorphous solid (229 mg, 71%)