Sodium borohydride → 3-fluoro-4-(2-(1-((2-(trimethylsilyl)ethoxy)methyl)-1H-imidazol-4-yl)thieno[3,2-b]pyridin-7-yloxy)benzenamine

Participants

Reaction Steps

To a solution of 7-(2-fluoro-4-nitrophenoxy)-2-(1-((2-(trimethylsilyl)ethoxy)methyl)-1H-imidazol-4-yl)thieno[3,2-b]pyridine (103) (WO 2006010264) (400 mg, 0.82 mmol) in MeOH (10 mL) at 0° C. was added NiCl2×6H2O (650 mg, 2.5 eq, 2.73 mmol) and NaBH4 (165 mg, 4 eq, 4.4 mmol). The reaction mixture was allowed to stir for 1 hr, concentrated to dryness and the resultant solid was dissolved in 2 M HCl. This solution was then made basic with concentrated aqueous ammonium hydroxide and extracted with DCM. The DCM extract was dried over anhydrous sodium sulfate, filtered and evaporated to give 3-fluoro-4-(2-(1-((2-(trimethylsilyl)ethoxy)methyl)-1H-imidazol-4-yl)thieno[3,2-b]pyridin-7-yloxy)benzenamine (104) (350 mg, 100% yield).

Provenance & Evidence