Potassium Phosphate, Tribasic → 4-(((2R,3R)-1,3-dihydroxybutan-2-yl)amino)-6-(1-methyl-1H-indol-5-yl)pyrrolo[1,2-b]pyridazine-3-carboxamide

Participants

Reaction Conditions

Reaction Steps

A mixture of 6-bromo-4-(((2R,3R)-1,3-dihydroxybutan-2-yl)amino) pyrrolo[1,2-b]pyridazine-3-carboxamide (25 mg, 0.073 mmol), (1-methyl-1H-indol-5-yl)boronic acid (38.2 mg, 0.219 mmol), PdCl2(dppf)-CH2Cl2 adduct (11.90 mg, 0.015 mmol) and potassium phosphate, tribasic, 2M (0.182 mL, 0.364 mmol) in DMA (0.5 mL) was heated to 95° C. for 45 minutes. After cooling to rt, the reaction mixture was filtered and the filtrate was purified via preparative LC/MS with the following conditions: Column: Waters XBridge C18, 19×250 mm, 5-μm particles; Guard Column: Waters XBridge C18, 19×10 mm, 5-μm particles; Mobile Phase A: 5:95 acetonitrile:water with 10-mM ammonium acetate; Mobile Phase B: 95:5 acetonitrile:water with 10-mM ammonium acetate; Gradient: 0-100% B over 25 minutes, then a 5-minute hold at 100% B; Flow: 20 mL/min. Fractions containing the desired product were combined and dried via centrifugal evaporation. 1H NMR (500 MHz, DMSO-d6) δ 10.65 (d, J=8.4 Hz, 1H), 8.17 (s, 1H), 8.10 (d, J=1.5 Hz, 1H), 7.93 (d, J=1.0 Hz, 1H), 7.57 (dd, J=8.4, 1.5 Hz, 1H), 7.45 (d, J=8.4 Hz, 1H), 7.31 (dd, J=6.7, 2.2 Hz, 2H), 6.43 (d, J=3.0 Hz, 1H), 5.13-4.89 (m, 2H), 4.27-4.08 (m, 2H), 3.80 (s, 3H), 3.73-3.61 (m, 2H), 1.13 (d, J=6.4 Hz, 3H). to afford the title compound (24.6 mg, 85% yield). MS (ES+) m/z: 394.1 (M+H); LC retention time: 1.27 min (analytical HPLC Method P).

Provenance & Evidence