Sodium Cyanate → Tert-butyl (6-(7-(2-fluoro-4-ureidophenoxy)thieno[3,2-b]pyridin-2-yl)pyridin-3-yl)methyl(2-methoxyethyl)carbamate

Participants

Reaction Steps

To a solution of compound 126 (3.0 g, 5.72 mmol) in AcOH (13.6 mL) at 0° C. was added a solution of sodium cyanate (0.743 g, 11.44 mmol, 2 eq.) in water (5.2 mL). The mixture was stirred at r.t. for 20 h. Water (100 mL) was added and the reaction mixture turned into a suspension. After 30 min, the solid was collected by filtration and the product cake was washed with water (2×20 mL), dried in vacuum and purified by Biotage SPI Flash Purification System (eluent a gradient EA/MeOH, 100/0 to 90/10) to afford 288 as a white solid (2.0 g, 3.52 mmol, 62% yield). MS (m/z): 568.4 (M+H).

Provenance & Evidence