反应详情

A solution of 1,1-dimethylethyl 4-{4-[3-(methyloxy)-4-nitrophenyl]-1-piperazinyl}-1-piperidinecarboxylate (5.67 g, 13.5 mmol) and DCM (110 mL) was cooled with an ice/H2O bath. TFA (30.0 mL, 389 mmol) was added dropwise via addition funnel. Upon completion, by TLC, the reaction mixture was quenched with 1N NaOH (300 mL), extracted with DCM, dried (MgSO4) and concentrated to provide the title compound of step D (4.01 g, 12.5 mmol, 93%). 1H NMR (400 MHz, DMSO-d6) δ ppm 1.20-1.31 (m, 2H), 1.68 (d, J=9.9 Hz, 2H), 2.22-2.32 (m, 2H), 2.34-2.45 (m, 2H), 2.54-2.61 (m, 4H), 2.95 (d, J=12.1 Hz, 2H), 3.36-3.43 (m, 4H), 3.88 (s, 3H), 6.50 (d, J=2.6 Hz, 1H), 6.57 (dd, J=9.4, 2.4 Hz, 1H), 7.86 (d, J=9.5 Hz, 1H).

1. customUpon completion, by TLC, the reaction mixture was quenched with 1N NaOH (300 mL)
2. extractionextracted with DCM
3. dry with materialdried (MgSO4)
4. concentrationconcentrated