Diisopropylethylamine → HCID 178453521, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of carbamate 88 (500 mg, 1.34 mmol) and methyl 3,5-diamino-6-chloropyrazine-2-carbonylcarbamimidothioate (10, 790 mg, 2.01 mmol) in EtOH (30 mL) was added DIPEA (1.75 mL, 9.39 mmol) at room temperature. The reaction mixture was heated at 70° C. in a sealed tube for 2 h, then cooled to room temperature, and concentrated in vacuo. The residue was purified by column chromatography (silica gel, 90:9:1 CHCl3/CH3OH/NH4OH) to afford carbamate 89 (660 mg, 84%) as a yellow solid: 1H NMR (300 MHz, CD3OD) δ 7.65 (d, J=7.5 Hz, 2H), 7.56 (s, 1H), 7.31 (dd, J=8.4, 1.5 Hz, 1H), 7.16 (d, J=2.4 Hz, 1H), 7.08 (dd, J=8.7, 2.4 Hz, 1H), 4.10 (t, J=6.3 Hz, 2H), 2.81 (t, J=6.6 Hz, 2H), 2.01-1.97 (m, 2H), 1.83-1.60 (m, 4H), 1.43 (s, 9H).

Provenance & Evidence