Acetic Acid → HCID 68224169, compound

Participants

Reaction Steps

To a suspension of aldehyde 47 (0.3 g, 0.669 mmol) in a mixture of DCM (9 mL) and DMF (3 mL) were added 4-amino—Boc-piperidine (0.27 g, 1.34 mmol) and acetic acid (80 μL, 1.34 mmol) at RT. The reaction mixture was stirred for 1.5 hr, treated with NaBH(OAc)3 (0.425 g, 2.00 mmol) and stirred overnight, then quenched by addition of saturated NaHCO3 solution and extracted with DCM/MeOH. The extract was washed with brine, dried over MgSO4 and concentrated. The residue was purified by flash chromatography on silica gel (EtOAc/MeOH: 93/7 to 84/16) to afford title compound 607 (0.355 g, 84% yield) as a pale brown solid. 1H NMR (300 MHz, DMSO-d6) δ (ppm): 8.69 (s, 1H), 8.58 (brs, 1H), 8.51 (d, J=5.7 Hz, 1H), 8.30 (s, 1H), 8.22 (d, J=8.1 Hz, 1H), 7.91 (dd, J=8.4, 1.8 Hz, 1H), 7.72 (dd, J=13.5, 1.8 Hz, 1H), 7.37 (t, J=9.0 Hz, 1H), 7.25-7.15 (m, 1H), 6.64 (d, J=5.4 Hz, 1H), 6.55 (d, J=2.7 Hz, 1H), 3.85-3.75 (m, 2H), 3.81 (s, 2H), 2.90-2.65 (m, 2H), 1.85-1.75 (m, 2H), 1.45-1.35 (m, 1H), 1.39 (s, 9H), 1.25-1.10 (m, 2H), 0.71-0.62 (m, 2 Hz, 0.48-0.40 (m, 2H).

Provenance & Evidence