To a solution of N-[4-(7-amino-4-{[(1E)-(dimethylamino)methylene]amino}thieno[3,2-c]pyridin-3-yl)-2-methoxyphenyl]-1-methyl-1H-indole-2-carboxamide (0.020 g, 0.040 mmol) in pyridine (1.1 mL) at 0° C. was added phenyl isocyanate (0.0043 mL, 0.040 mmol). The mixture was allowed to warm to ambient temperature, and was stirred at ambient temperature for 12 h. The reaction mixture was concentrated, and the residue was purified by flash column chromatography on silica gel, which had been deactivated with triethylamine (10% by volume of silica gel used), using methanol/dichloromethane as the mobile phase, to afford an intermediate that was then subjected to General Procedure M for formamidine hydrolysis to yield the title compound (0.007 g, 32%) as an off-white foam: 1H NMR (DMSO-d6, 400 MHz) δ 9.52 (s, 1H), 9.07 (s, 1H), 8.58 (s, 1H), 8.09 (s, 1H), 8.06 (d, 1H), 7.73 (m, 2H), 7.60 (d, 1H), 7.49 (d, 2H), 7.36 (s, 1H), 7.30 (m, 4H), 7.14 (m, 2H), 7.00 (t, 1H), 6.10 (br, 2H), 4.04 (s, 3H), 3.93 (s, 3H); MS: (MH)+ 563.
