Sodium Azide → HCID 86637999, compound

Participants

Reaction Conditions

Reaction Steps

2-(4-(4-(3-bromo-4-fluorophenyl)-5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)-1,2,5-oxadiazol-3-ylamino)ethyl methanesulfonate (50.0 g, 0.108 mol) was dissolved in N,N-dimethylformamide (83 mL). Sodium azide (10.5 g, 0.162 mol) was added. The reaction was stirred at 65° C. for 5-6 hours. LCMS indicated reaction completed (M+Na=435). The reaction was quenched with water (250 mL) and extracted with ethyl acetate (2×250 mL). The combined ethyl acetate solution was washed with water (250 mL, layer separation was slow, 100 mL of brine was added to improve the separation), dried over sodium sulfate, and concentrated to give 49.7 g crude brown solid. Crude yield is 112%. LCMS for C12H8BrFN8O3Na (M+Na)+: m/z=433.0, 435.0. 1H NMR (400 MHz, DMSO-d6): δ 8.08 (dd, J=6.2, 2.5 Hz, 1 H), 7.72 (m, 1 H), 7.58 (t, J=8.7 Hz, 1 H), 6.75 (t, J=5.7 Hz, 1 H), 3.54 (t, J=5.3 Hz, 2 H), 3.45 (dd, J=11.1, 5.2 Hz, 2 H).

Provenance & Evidence