反应详情

A mixture of 6-methoxynaphthalen-2-ylboronic acid (333 mg, 1.650 mmol), 1-(3-bromo-5-fluoropyridin-4-yl)ethanol 4a (330 mg, 1.5 mmol), sodium carbonate (2M in water, 1.5 mL, 3.00 mmol), PdCl2(dppf).CH2Cl2 adduct (61.2 mg, 0.075 mmol) in DMF (6 mL) was heated to 100° C. for 2 hrs. The mixture was quenched with sat NaHCO3 and extracted with EtOAc two times, dried over magnesium sulfate, filtered, concentrated. The residue was purified via Biotage (20-60% EtOAc/heptane; SNAP25 column) giving the title compound (227 mg, 51%) as a white solid. 1H NMR (400 MHz, CDCl3) δ ppm 1.62 (dd, J=6.7, 1.0 Hz, 3H), 3.96 (s, 3H), 4.99 (q, J=6.7 Hz, 1H), 7.19-7.26 (m, 2H), 7.36 (dd, J=8.4, 1.7 Hz, 1H), 7.70 (s, 1H), 7.78 (d, J=8.9 Hz, 1H), 7.83 (d, J=8.5 Hz, 1H), 8.40 (s, 1H), 8.48 (d, J=2.7 Hz, 1H). LC-MS (M+1) 298.0, t=1.49 min.

1. customThe mixture was quenched with sat NaHCO3
2. extractionextracted with EtOAc two times
3. dry with materialdried over magnesium sulfate
4. filtrationfiltered
5. concentrationconcentrated
6. customThe residue was purified via Biotage (20-60% EtOAc/heptane; SNAP25 column)