反应详情

温度

100 °C

A mixture of 3-Methyl-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-3H-benzooxazol-2-one (138 mg, 0.5 mmol), 3-Bromo-5-fluoro-pyridine-4-carbaldehyde (102 mg, 0.5 mmol), Na2CO3 (2 M in water, 0.75 mL, 1.5 mmol) and PdCl2(PPh3)2 (17 mg, 0.03 mmol) in DMF (3 mL) was heated at 100° C. for 4 hrs. After concentration, the residue was diluted with DCM and saturated NH4Cl solution. After filtration and concentration, the residue was purified by flash column (MeOH—CH2Cl2, v/v, 0-1.5%) and afforded the title compound (47 mg, 35%). 1H NMR (400.3 MHz, CDCl3): δ 3.45 (s, 3H), 6.96 (d, J=1.7 Hz, 1H), 7.08 (dd, J=8, 1.7 Hz, 1H), 7.32 (d, J=8 Hz, 1H) 8.59 (s, 1H), 8.68 (d, J=1.3 Hz, 1H), 10.07 (s, 1H).

1. concentrationAfter concentration
2. additionthe residue was diluted with DCM and saturated NH4Cl solution
3. filtrationAfter filtration and concentration
4. customthe residue was purified by flash column (MeOH—CH2Cl2, v/v, 0-1.5%)