反应详情

A solution of lithium diisopropylamide (2.0 M in THF, 0.18 mL, 0.36 mmol) was added to a solution of 7-methoxy-4-(3-(trifluoromethyl)phenyl)-2,3-dihydro-1H-inden-1-one (103 mg, 0.34 mmol) in THF (1.1 mL) at −78° C. After 1 h at −78° C., methyl cyanoformate (40 μL, 0.50 mmol) was added and the reaction mixture was allowed to warm to room temperature. After stirring at room temperature overnight, the reaction was quenched with saturated aqueous NH4Cl (25 mL) and extracted with EtOAc (3×40 mL). The combined organic extracts were dried (Na2SO4), filtered and concentrated. The resulting crude residue was purified by combiflash (12 g column, hexanes→EtOAc, gradient) to afford 26 mg (21%) of methyl 7-methoxy-1-oxo-4-(3-(trifluoromethyl)phenyl)-2,3-dihydro-1H-indene-2-carboxylate.

1. customthe reaction was quenched with saturated aqueous NH4Cl (25 mL)
2. extractionextracted with EtOAc (3×40 mL)
3. dry with materialThe combined organic extracts were dried (Na2SO4)
4. filtrationfiltered
5. concentrationconcentrated
6. customThe resulting crude residue was purified by combiflash (12 g column, hexanes→EtOAc, gradient)