Diisopropylethylamine → US9433622, Dmx-131

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To a solution of compound 18 (100 mg, 0.24 mmol) in EtOH (5 mL) was added 2-(pyrrolidin-2-yl)acetamide-HCl (160 mg, 1.22 mmol) and DIPEA (0.22 mL, 1.22 mmol) at rt and the reaction mixture was heated at reflux for 16 h. The reaction mixture was cooled to rt, concentrated to half of its volume and triturated with n-pentane, the precipitated solid was collected by filtration to obtain DMX-130 (80 mg, 65%) as a white solid. Rf: 0.4 (10% MeOH/CHCl3); (m/z): 499.8 [M+1]+; 1H NMR (300 MHz, DMSO-d6): δ 9.77 (1H, s), 9.13 (1H, d, J=2.4 Hz), 8.87 (1H, d, J=2.4 Hz), 8.66 (1H, d, J=1.8 Hz), 8.50 (1H, d, J=5.1 Hz), 8.16 (1H, dd, J=2.7, 9.0 Hz), 7.46 (1H, d, J=5.7 Hz), 7.38 (1H, d, J=9.0 Hz), 7.30 (1H, br), 6.84 (1H, br), 4.74 (1H, br), 3.97 (1H, br), 3.80-3.76 (1H, br), 3.59-3.53 (6H, m), 2.76-2.70 (1H, m), 2.40 (4H, br), 2.23-2.15 (1H, m), 2.10-2.98 (3H, m), 1.86-1.84 (1H, m).

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