(E)-2-[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-yl]-ethenesulfonic acid amide → 2-(2-(1-isopropyl-1H-1,2,4-triazol-5-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepin-9-yl)ethanesulfonamide

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To a solution of (E)-2-[2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-yl]-ethenesulfonic acid amide (151 mg, 0.38 mmol) in DCM (5 mL) and IMS (2 mL) was added 10% palladium on carbon (150 mg, 10%). The reaction mixture was stirred at RT under an atmosphere of hydrogen for 16 h. The reaction mixture was filtered and the filtrate concentrated in vacuo. The resultant residue was subjected to reverse phase preparative HPLC (C18, eluting with 10-90% acetonitrile in H2O, 0.1% formic acid, 25 min gradient) to yield 445 as a white solid (74 mg, 49%). LCMS: RT=3.24 min, [M+H]+=403. 1H NMR 400 MHz 6 (DMSO-d6): 8.29 (1H, d, J=8.7 Hz), 7.87 (1H, s), 7.86 (1H, s), 7.02 (1H, dd, J=8.5, 1.8 Hz), 6.93 (1H, d, J=1.8 Hz), 6.83 (2H, br s), 5.84 (1H, sept, J=6.6 Hz), 4.52-4.41 (4H, m), 3.27-3.20 (2H, m), 3.02-2.92 (2H, m), 1.44 (6H, d, J=6.6 Hz)

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