Acetic Acid → HCID 11951825, compound

Participants

Reaction Steps

Bis-(2-methoxyethyl)amine (3.0 g, 22.5 mmol) was added to a stirred solution of propanal 75 (1.2 g, 4.9 mmol) in MeOH (100 ml) at 0° C. and the solution stirred for 30 min. NaCNBH3 (1.5 g, 24 mmol) was added and the solution stirred at 0° C. for 30 min and 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 80 (1.1 g, 50%) as a yellow oil: 1H NMR [(CD3)2SO] δ 8.19 (s, 1H, H-9), 7.83 (s, 1H, H-5), 3.61-3.68 (m, 4H, 2×CH2O), 3.31-3.38 (m, 4H, 2×CH2N), 3.26 (s, 6H, 2×OCH3), 3.20-3.14 (m, 4H, 2×CH2), 3.07-3.12 (m, 4H, H-6, H-8), 2.15-2.10 (m, 4H, H-7, CH2); 13C NMR δ 163.9, 154.7, 149.0, 146.7, 131.8, 122.2, 113.6, 58.0 (2), 57.4 (2), 52.4, 52.3, 32.5, 32.2, 25.3, 23.0 (2), 19.1; HRMS (FAB+) calcd for C19H29N4O3 (MH+) m/z 361.2240, found 361.2243.

Provenance & Evidence