反应详情

To solution of Weinreb amide 22 (4.5 g, 13.4 mmol) in THF (100 mL) was added 4-ethylphenylmagnesium bromide (0.5M in THF, 50.8 mL, 26.9 mmol) at 0° C. The reaction mixture was warmed up to r.t. slowly and stirred at r.t. for 15 hours. To the reaction mixture was added aqueous saturated NH4Cl solution (100 mL). The mixture was extracted with EtOAc (100 mL). The organic layer was dried over MgSO4, filtered and concentrated in vacuo. The residue was triturated with hexane (100 mL) and stirred at r.t. for 30 min. The solid was precipitated, filtered, washed with hexane (50 mL) and dried under high vacuum to obtain the title product (4.30 g, 73%).

1. extractionThe mixture was extracted with EtOAc (100 mL)
2. dry with materialThe organic layer was dried over MgSO4
3. filtrationfiltered
4. concentrationconcentrated in vacuo
5. customThe residue was triturated with hexane (100 mL)
6. stirringstirred at r.t. for 30 min
7. customThe solid was precipitated
8. filtrationfiltered
9. washwashed with hexane (50 mL)
10. customdried under high vacuum