Triethylamine → 2-{4-[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulen-8-yl]-pyrazol-1-yl}-N-(1-methyl-azetidin-3-yl)-isobutyramide

Participants

Reaction Steps

To a solution of 2-{4-[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulen-8-yl]-pyrazol-1-yl}-2-methyl-propionic acid (0.350 g, 0.000753 mol) and oxalyl chloride (2M in methylene chloride, 0.38 mL, 0.0007534 mol) in dry methylene chloride (2.415 mL, 0.03767 mol) was added 1 drop of N,N-dimethylformamide (0.02917 mL, 0.0003767 mol). The solution was stirred for 1 h at room temperature and concentrated in vacuo. The acid chloride was re-dissolved in methylene chloride (1.739 mL, 0.02712 mol) and added dropwise to a solution of 1-methyl-azetidin-3-ylamine (0.1198 g, 0.0007534 mol) and triethylamine (0.3255 mL, 0.002336 mol) in methylene chloride (1.739 mL, 0.02712 mol). The reaction was stirred at room temperature for 3 h. Brine and methylene chloride were added and the aqueous layer was extracted 3× with methylene chloride. The organic layers were combined, dried with MgSO4, and concentrated. The crude was purified by reverse-phase HPLC to give 453 (90.1 mg) as a beige solid. MS(ESI+) 533.2. 1H NMR (400 MHz, DMSO) δ 8.40 (s, 1H), 8.32 (d, J=8.3, 1H), 8.10 (s, 1H), 8.02 (s, 1H), 7.76 (d, J=6.9, 1H), 7.51 (dd, J=8.3, 1.8, 1H), 7.40 (d, J=1.7, 1H), 5.84 (sept, J=6.4, 1H), 4.39 (t, J=5.0, 2H), 4.25-4.15 (m, 1H), 3.46 (m, 4H), 2.89 (t, J=7.3, 2H), 2.22 (s, 3H), 1.73 (s, 6H), 1.56 (d, J=6.6, 6H)

Provenance & Evidence