Triethylamine → 2-(4-(2-(1-isopropyl-3-methyl-1H-1,2,4-triazol-5-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepin-9-yl)piperidin-1-yl)-N-methylacetamide

Participants

Reaction Steps

To a suspension of 2-(2-isopropyl-5-methyl-2H-[1,2,4]triazol-3-yl)-8-piperidin-4-yl-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene hydrochloride (150 mg, 0.35 mmol) was added triethylamine (107 μL, 0.77 mmol) followed by 2-chloro-N-methyl-acetamide (41 mg, 0.38 mmol). The resultant mixture was stirred overnight before the addition of tetrabutylammonium iodide (13 mg, 0.04 mmol) and the reaction stirred for 24 hours. The mixture was washed with water then extracted with 10% MeOH in DCM (×5). The combined organic layers were dried (MgSO4), concentrated in vacuo and purified by flash column chromatography (SiO2, gradient 0-10% MeOH in DCM) twice to afford 275 (23 mg, 0.05 mmol, 14%). LCMS: RT=2.63 min, [M+H]+=464. 1H NMR δ (ppm) (CDCl3): 8.42 (1 H, d, J=8.30 Hz), 7.59 (1 H, s), 7.00 (1 H, dd, J=8.35, 1.83 Hz), 6.88 (1 H, d, J=1.79 Hz), 5.91-5.81 (1 H, m), 4.48-4.44 (2 H, m), 4.42-4.36 (2 H, m), 3.13-2.91 (4 H, m), 2.85 (3 H, d, J=4.98 Hz), 2.56-2.48 (1 H, m), 2.39 (3 H, s), 2.33 (2 H, s), 1.87 (2 H, s), 1.78 (2 H, s), 1.54 (6 H, d, J=6.65 Hz). NH not observed.

Provenance & Evidence