Diphosgene → Tert-butyl (6-(7-(2-fluoro-4-(3-phenyl-2-thioxoimidazolidine-1-carboxamido)phenoxy)thieno[3,2-b]pyridin-2-yl)pyridin-3-yl)methyl(2-methoxyethyl)carbamate

Participants

Reaction Steps

Diphosgene (0.023 ml, 0.191 mmol) was added in one portion to a solution of 126 (schemes 6 or 9) (0.200 g, 0.381 mmol) in THF (3.81 ml) and the reaction mixture stirred vigorously for 2 h. 1-Phenylimidazolidine-2-thione (301, 0.102 g, 0.572 mmol) and sodium hydride (60% in mineral oil) (0.046 g, 1.143 mmol) were added sequentially and the mixture was stirred at room temperature for an additional 1 h. The crude mixture was then suspended in EtOAc, washed with water, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified by preparative HPLC (column: Luna C18 (2), 5.0 cm ID; gradient: 80% MeOH to 95% MeOH in water, 60 min) affording title compound 302 (0.068 g, 0.093 mmol, 24.5% yield) as creamy solid. m/z: (M+1)+ 729.4 (100%).

Provenance & Evidence