反应详情

A solution of trimethylaluminium (2 M in toluene, 500 μL, 1.0 mmol) was added dropwise (exothermic) to a solution of ethanolamine (61 mg, 60 μL, 1.0 mmol) in dioxane (6 mL) and the resulting mixture was stirred at room temperature for 1 h. Then a solution of 6-{[3-(4-fluoro-phenyl)-5-methyl-isoxazol-4-ylmethyl]-amino}-pyridazine-3-carboxylic acid ethyl ester (89 mg, 0.25 mmol) in dioxane (3 mL) was added. The resulting mixture was then heated at 85-95° C. for 4 h and then cooled to room temperature and then poured into a sodium potassium tartrate solution and extracted with ethyl acetate which was then washed with brine, dried over sodium sulfate and evaporated. Purification by chromatography (SiO2, dichloromethane:methanol=100:0 to 9:1) afforded the title compound (19 mg, 20%) which was obtained as a light yellow foam. MS: m/e=372.3 [M+H]+.

1. temperatureThe resulting mixture was then heated at 85-95° C. for 4 h
2. temperaturecooled to room temperature
3. extractionextracted with ethyl acetate which
4. washwas then washed with brine
5. dry with materialdried over sodium sulfate
6. customevaporated
7. customPurification by chromatography (SiO2, dichloromethane:methanol=100:0 to 9:1)