tert-Butyl methyl ether → HCID 67443150, compound

Participants

Reaction Steps

To a stirred solution of 7-chlorothieno[3,2-b]pyridine (9.26 g, 54.6 mmol) in THF (88 mL) at −15° C. was added n-BuLi (21.84 mL, 54.6 mmol). After 30 min, a solution of ZnCl2 0.5M in THF (109 mL, 54.6 mmol) was added at −15° C. and the reaction mixture was warmed to RT over 45 min. A solution of palladium tetrakistriphenylphosphine (0.841 g, 0.73 mmol) and iodide 260 (11.29 g, 36.4 mmol) in THF (33 mL) was added and the mixture was heated to reflux for 3 h then concentrated. The residue was diluted with water and ammonium hydroxide and extracted with DCM. The organic extract was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by Biotage (SNAP 80 g cartridge; AcOEt/Hex:0/100 to 100/0 over 20 CV) to produce a material that upon trituration with. MTBE afforded the title compound 261 (1.2 g, 3.41 mmol, 9% yield) as light-brown solid. MS (m/z): 437.45 (M+H).

Provenance & Evidence