Acetic Acid → HCID 67334083, compound

Participants

Reaction Steps

A solution of anhydrous Me2NH (2.4 g, 52 mmol) in MeOH (50 mL) was added to a solution of propanal 75 (1.5 g, 6.2 mmol) in MeOH (50 ml) at 0° C. and the solution stirred for 20 min. NaCNBH3 (1.5 g, 24 mmol) was added and the solution stirred for 30 min, then HOAc (2 ml) was added and the mixture was stirred at 20° C. for 16 h. The solvent was evaporated and the residue was partitioned between DCM (200 mL) and water (200 mL). The aqueous phase was extracted with DCM (2×200 ml), the combined organic phase was dried and the solvent evaporated. The residue was purified by chromatography, eluting with 10% MeOH/EtOAc, to give 1-oxide 78 (930 mg, 55%) as a yellow oil: 1H NMR [(CD3)2SO] δ 8.17 (s, 1H, H-9), 7.81 (s, 1H, H-5), 3.06-3.12 (m, 4H, H-6, H-8), 2.94-3.03 (m, 4H, 2×CH2), 2.66 [s, 6H, N(CH3)2], 2.07-2.18 (m, 4H, H-7, CH2); 13C NMR δ 164.1, 155.0, 149.2, 146.8, 131.9, 122.4, 113.7, 56.6, 43.0 (2), 33.3, 32.7, 32.4, 25.4, 22.7; HRMS (FAB+) calcd for C15H21N4O (MH+) m/z 273.1715, found 273.1714.

Provenance & Evidence