反应详情

tert-Butyl 1-(4-(8-chloro-4-oxo-2-phenyl-4H-pyrano[2,3-c]pyridin-3-yl)phenyl)cyclobutylcarbamate (50.3 mg, 0.1 mmol) was dissolved in 1,4-dioxane (5 mL). Methyl boronic acid (8.98 mg, 0.15 mmol) and potassium carbonate (41.5 mg, 0.3 mmol) were added. The solution was degassed, flushing with nitrogen tetrakis (11.56 mg, 0.01 mmol) was added and the solution was refluxed for 24 h. The reaction mixture was filtered, washed with ethyl acetate and evaporated. The crude product was purified by column chromatography using hex and ethyl acetate (0-65%) to give the title compound (20 mg, 42%). LCMS (Method I): RT=7.40 min, [M+H]+=483.

1. customThe solution was degassed
2. additionwas added
3. temperaturethe solution was refluxed for 24 h
4. filtrationThe reaction mixture was filtered
5. washwashed with ethyl acetate
6. customevaporated
7. customThe crude product was purified by column chromatography