Isobutylene oxide → 1-{3-[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulen-8-yl]-azetidin-1-yl}-2-methyl-propan-2-ol

Participants

Reaction Steps

To a mixture of 8-azetidin-3-yl-2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene TFA salt 235 (250 mg, 0.52 mmol) in MeOH (3 mL) was added diisopropylethylamine (110 μL, 0.62 mmol) followed by 1,2-epoxy-2-methylpropane (230 μL, 2.6 mmol) and the reaction mixture was stirred at RT for 18 hours. The reaction mixture was concentrated in vacuo and the residue purified by flash chromatography (SiO2, 0-7.5% MeOH in DCM) to give a solid that was recrystallised from heptane to give 421 (87 mg, 38%). LCMS: RT=7.41 min, [M+H]+=440. 1H NMR δ (ppm) (DMSO-d6): 8.26 (1H, d, J=8.17 Hz), 8.06 (1H, d, J=0.59 Hz), 7.16 (1H, dd, J=8.23, 1.81 Hz), 7.00 (1H, d, J=1.76 Hz), 5.83-5.75 (1H, m), 4.32 (2H, t, J=5.03 Hz), 4.00 (1H, s), 3.65 (2H, t, J=6.98 Hz), 3.61-3.51 (1H, m), 3.39 (2H, t, J=5.08 Hz), 3.14 (2H, t, J=6.52 Hz), 2.32 (2H, s), 1.51 (6H, d, J=6.59 Hz), 1.03 (6H, s)

Provenance & Evidence