Water → 5-(1-(Benzo[D]thiazol-2-YL)piperidin-4-YL)-7,7-dimethyl-5H-pyrrolo[2,3-B]pyrazin-6(7H)-one

Participants

Reaction Conditions

Reaction Steps

A mixture of 7,7-dimethyl-5-(piperidin-4-yl)-5H-pyrrolo[2,3-b]pyrazin-6(7H)-one hydrochloride (Intermediate 78) (0.107 g, 0.378 mmol), potassium carbonate (0.183 g, 1.324 mmol), and 2-chlorobenzo[d]thiazole (0.077 g, 0.454 mmol) in DMSO (3 mL) was heated at 110° C. in 2 h. The reaction mixture was cooled, H2O was added, and extracted with DCM (3×). The organic extracts were dried over Na2SO4, filtered, concentrated, and purified by reverse phase HPLC. The pure fractions were concentrated to minimal H2O, neutralized with saturated aqueous NaHCO3. The white solid was collected, washed with H2O, and dried to afford the title compound (67 mg, 47%). MS (M+1): 380. 1H NMR (400 MHz, DMSO-d6) δ ppm 8.04-8.19 (2 H, m), 7.77 (1 H, d, J=7.4 Hz), 7.46 (1 H, d, J=8.0 Hz), 7.21-7.35 (1 H, m), 6.98-7.14 (1 H, m), 4.46-4.65 (1 H, m), 4.18 (2 H, d, J=13.1 Hz), 3.32-3.41 (2 H, m), 2.52-2.62 (2 H, m), 1.83 (2 H, d, J=10.8 Hz), 1.33 (6 H, s)

Provenance & Evidence