Acetic Acid → 4-(2-(1-isopropyl-1H-1,2,4-triazol-5-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepin-9-yl)-1-methyl-1,2,3,6-tetrahydropyridine-3-carboxamide

Participants

Reaction Steps

To a solution of 4-[2-(2-isopropyl-2H[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-yl]-1,2,5,6-tetrahydro-pyridine-3-carboxylic acid amide from Example 414 (0.15 g, 0.35 mmol) in DCM (16 mL) and methanol (8 mL) was added formaldehyde (0.053 mL, 37% aq., 0.7 mmol), sodium triacetoxyborohydride (0.11 g, 0.52 mmol) and acetic acid (24 μL, 0.42 mmol). The reaction mixture was stirred at RT for 16 h. Sodium hydrogen carbonate (aqueous) and 10% methanol in DCM were added to the mixture and the organic fraction separated, dried (Na2SO4), filtered and concentrated in vacuo. The resultant residue was subjected to flash chromatography (SiO2, gradient 0 to 10% methanol in DCM) to give the title compound. The product was triturated with diethyl ether, filtered and dried to give the title compound (24 mg, 16%). LCMS: RT=2.39 min, [M+H]+=434. 1H NMR 400 MHz (DMSO-d6) δ: 8.33 (1H, d, J=8.48 Hz), 7.92 (1H, s), 7.91 (1H, s), 7.32 (1H, br, s), 7.27 (1H, dd, J=8.51, 1.92 Hz), 7.11 (1H, d, J=1.86 Hz), 6.90 (1H, br, s), 6.35 (1H, d, J=3.82 Hz), 5.90-5.89 (1H, m), 4.51-4.49 (4H, m), 3.53 (1H, s), 3.31 (1H, m), 2.97 (1H, m), 2.85 (1H, m), 2.64 (1H, m), 2.33 (3H, s), 1.48 (6H, dd, J=6.60, 3.70 Hz)

Provenance & Evidence