1-Hydroxybenzotriazole → N-(2-hydroxy-2-methylpropyl)-2-(1-isopropyl-1H-1,2,4-triazol-5-yl)-4,5-dihydrobenzo[b]pyrazolo[1,5-d][1,4]oxazepine-9-carboxamide

Participants

Reaction Steps

2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,10b-diaza-benzo[e]azulene-9-carboxylic acid (0.2 g, 0.59 mmol) was suspended in DMF (5 mL) and DIPEA (0.21 mL, 1.2 mmol) added. The resultant solution was treated with HATU (0.23 g, 0.6 mmol) and HOBT (81 mg, 0.6 mmol) before the addition of 1-amino-2-methyl-propan-2-ol (52.5 mg, 0.59 mmol) then stirred for 18 h at RT. The reaction mixture was concentrated in vacuo and the resultant residue partitioned between DCM and water. The aqueous layer was extracted three times with DCM and the combined organic extracts washed with water, dried (Na2SO4), filtered and concentrated in vacuo. The resultant residue was subjected to flash chromatography (SiO2, gradient 0 to 10% MeOH in ethyl acetate) and recrystallistion from ethyl acetate to give 116 (163 mg, 67%). 1H NMR (CDCl3, 400 MHz): δ 8.46 (d, J=2.2 Hz, 1 H); 7.94 (s, 1 H); 7.72 (dd, J=8.4, 2.2 Hz, 1 H); 7.22 (d, J=8.4 Hz, 1 H); 6.86 (s, 1 H); 6.66 (s, 1 H); 5.74-5.61 (m, 1 H); 4.57 (t, J=5.7 Hz, 2 H); 3.50 (d, J=5.9 Hz, 2 H); 3.22 (t, J=5.7 Hz, 2 H); 2.18 (s, 1 H); 1.59 (d, J=6.6 Hz, 6 H); 1.31 (s, 6 H). LCMS: RT=9.53 min, M+H+=411

Provenance & Evidence