Pyridine → tert-butyl 4-(2-(4-(7-(4-(3-cyclopropylureido)-2-fluorophenoxy)thieno[3,2-b]pyridin-2-yl)-1H-imidazol-1-yl)ethyl)piperazine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 306 (2.10 g, 3.90 mmol) and pyridine (631 μl, 4.68 mmol) in DMF (20 ml) at 0° C. was added phenyl chloroformate (587 μl, 4.68 mmol). After 45 min cyclopropylamine (687 μl, 9.75 mmol) was added at 0° C. and the reaction mixture was heated at 60° C. for 30 min. After cooling to RT the reaction mixture was quenched by addition of water and extracted with AcOEt. The organic layer was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by Biotage (SNAP 100 g cartridge; MeOH/DCM: 0/100 to 10/90 over 20 CV), to afford the title compound 307 (1.4 g, 2.25 mmol, 58% yield) as a beige solid. MS (m/z): 622.33 (M+H).

Provenance & Evidence