反应详情

A solution of (5-amino-3-bromo-7-iodo-5H-chromeno[2,3-b]pyridin-5-yl)methanol (10.00 g, 23.09 mmol) and bromoacetonitrile (12.06 mL, 173 mmol) in 25 mL THF was heated to 40° C. Lithium tert-butoxide [1N in THF (173 mL, 173 mmol)] was added drop wise via addition funnel over 5 hours. After completed addition, the reaction mixture was concentrated. The residue was purified by column chromatography [0-80% (95:5 EtOAc/MeOH)/heptane] to yield 2-((5-amino-3-bromo-7-iodo-5H-chromeno[2,3-b]pyridin-5-yl)methoxy)acetonitrile (5.58 g, 11.82 mmol, 51.2% yield).

1. additionwise via addition funnel over 5 hours
2. additionaddition
3. concentrationthe reaction mixture was concentrated
4. customThe residue was purified by column chromatography [0-80% (95:5 EtOAc/MeOH)/heptane]