反应详情

温度

0 °C

Title compound 19 (802 mg, 3.07 mmol) was dissolved in DCM (10 mL) and the mixture was cooled to 0° C. Trimethylaluminum 2M in toluene (1.8 mL, 3.69 mmol) was added dropwise and the reaction mixture was allowed to warm to room temperature. The mixture was then heated to 45° C. for 45 h. The mixture was cooled to room temperature for the slow addition of water. The solution was extracted with ethyl acetate then washed twice with HCl (10%), water and saturated solution of bicarbonate. The organic layer was then dried over sodium sulfate and concentrated in vacuo until the product precipitated. The solid was filtered and dried to afford title compound 20 (511 mg, 73%) as a white solid. LRMS (ESI): (calc) 229.05. (found) 230.1 (MS)+.

1. temperatureto warm to room temperature
2. temperatureThe mixture was then heated to 45° C. for 45 h
3. extractionThe solution was extracted with ethyl acetate
4. washthen washed twice with HCl (10%), water and saturated solution of bicarbonate
5. dry with materialThe organic layer was then dried over sodium sulfate
6. concentrationconcentrated in vacuo until the product
7. customprecipitated
8. filtrationThe solid was filtered
9. customdried