反应详情

Triacetoxylated sodium borohydride (15.0 g) was added under ice cooling to a liquid mixture of 6-bromoindoline (9.0 g), 1-(2-fluorophenethyl)piperidin-4-one (11.0 g) and acetic acid (12.5 ml) in 1,2-dichloroethane (140 ml). Then the reaction mixtures were stirred at room temperature overnight. The reaction mixtures were diluted with ethyl acetate (400 ml) and then an 8 N aqueous solution (70 ml) of sodium hydroxide was added thereto. The organic layer was separated, extracted with 5 N hydrochloric acid (100 ml) and then basified with an 8 N aqueous solution of sodium hydroxide. Then it was extracted with ethyl acetate and washed successively with water and brine. The ethyl acetate layer was dried over magnesium sulfate and the solvent was evaporated distilled off under reduced pressure to give the title compound (12.2 g) as a pale yellow solid (yield: 66.6%). 2.10(2H,dt,J=7.6,2.8 Hz), 2.48-2.53(2H,m), 2.77(2H,t, J=8.4 Hz), 2.83(2H,t,J=8.4 Hz), 2.96-3.03(2H,br-d), 3.37(2H,t,J=8.4 Hz), 3.34-3.43(1H,m), 6.57(1H,d,J=1.2 Hz), 6.61(1H,dd,J=7.6,1.2 Hz), 6.90(1H,d,J=7.6 Hz), 7.10-7.16(2H,m), 7.21-7.28(1H,m), 7.33(1H,dt,J=7.6,1.2 Hz).

1. customThen the reaction mixtures
2. customThe reaction mixtures
3. customThe organic layer was separated
4. extractionextracted with 5 N hydrochloric acid (100 ml)
5. extractionThen it was extracted with ethyl acetate
6. washwashed successively with water and brine
7. dry with materialThe ethyl acetate layer was dried over magnesium sulfate
8. customthe solvent was evaporated
9. distillationdistilled off under reduced pressure