Reaction Steps
HCl (4M in dioxane, 0.20 mL, 0.80 mmol) was added in a dropwise manner to a solution of (1R*,2S*)-5′-methoxy-2-(3-(6-(4-methylpiperazin-1-yl)pyridin-3-yl)-1H-indazol-6-yl)spiro[cyclopropane-1,3′-indolin]-2′-one (92 mg, 0.19 mmol) in MeOH (1 mL) and DCM (4 mL). The mixture was stirred for 1 h at rt prior to evaporation of the solvent in vacuo. MeOH (5 mL) and EtOAc (3 mL) were added, and filtration yielded the title compound as a beige solid (92.7 mg, 88%). 1H NMR (400 MHz, d6-DMSO) δ ppm 13.24 (br. s, 1H), 10.78 (br. s, 1H), 10.46 (s, 1H), 8.72 (s, 1H), 8.22 (dd, J=9.2, 2.0 Hz, 1H), 7.92 (d, J=8.0 Hz, 1H), 7.52 (s, 1H), 7.15 (d, J=8.8 Hz, 1H), 7.03 (d, J=8.4 Hz, 1H), 6.74 (d, J=8.4 Hz, 1H), 6.57 (dd, J=8.4, 2.4 Hz, 1H), 5.71 (d, J=2.4 Hz, 1H), 4.48 (d, J=14 Hz, 2H), 3.50 (d, J=11.6 Hz, 2H), 3.33 (t, J=12.8 Hz, 2H), 3.29 (s, 3H), 3.20 (t, J=8.4 Hz, 1H), 3.09 (m, 2H), 2.80 (d, J=4.4 Hz, 3H), 2.35 (m, 1H), 1.99 (m, 1H).
