N-Iodosuccinimide (0.333 g, 1.48 mmol) was added to a solution of tert-butyl 4-(4-aminofuro[3,2-c]pyridin-3-yl)-2-methoxyphenylcarbamate (0.439 g, 1.24 mmol) in N,N-dimethylformamide (10 mL) at ambient temperature. The reaction suspension was stirred for 18 hours, at which time no starting material remained. An aqueous solution of 10% sodium thiosulfate (10 mL) was added to the suspension and stirred for 30 minutes. The precipitate was collected by vacuum filtration and washed with water. The solid was dried in vacuo to give the title compound (0.501 g, 84%) as a tan solid. 1H NMR (DMSO-d6, 400 MHz) δ 8.08 (s, 1H), 8.07 (s, 1H), 8.06 (s, 1H), 7.85 (d, 1H), 7.13 (d, 1H), 7.04, (dd, 1H), 5.73-5.80 (bs, 2H), 3.86 (s, 3H), 1.48 (s, 9H); RP-HPLC (Conditions d) Rt 8.49 min.; MS: MH+ 482.
