反应详情

To a suspension of KH (1.3 eq) in DMF (1 mL) was added a solution of the product of Step C (157 mg, 0.566 mmol) in DMF (1 mL), followed by 18-crown-6 (30 mg; 0.2 eq). The reaction mixture was stirred for 5 minutes at room temperature. A solution of methyl 2-bromophenylacetate (168 mg, 0.735 mmol) in DMF (1 mL) was added, followed by a catalytic amount of potassium iodide. The reaction was heated to 80° C. for 0.5 hours then stirred at room temperature for 16 hours. After concentration in vacuo, the residue was partitioned between water and ethyl acetate. The combined organic layers were washed with water, brine, then dried (MgSO4). After filtration and concentration in vacuo, the residue was chromatographed on silica (MPLC, ethyl acetate/hexanes (5/95)) to afford 158 mg (66%) of the title compound (Rf =0.22, 5% ethyl acetate/hexanes).

1. temperatureThe reaction was heated to 80° C. for 0.5 hours
2. stirringthen stirred at room temperature for 16 hours
3. concentrationAfter concentration in vacuo
4. customthe residue was partitioned between water and ethyl acetate
5. washThe combined organic layers were washed with water, brine
6. dry with materialdried (MgSO4)
7. filtrationAfter filtration and concentration in vacuo
8. customthe residue was chromatographed on silica (MPLC, ethyl acetate/hexanes (5/95))