反应详情

To a solution of 87B (3.648 g, 8.0 mmol) and 4-fluorobenzene boronic acid (2.24 g, 16.0 mmol) in a mixed solvent of MeOH-THF (80 mL, 1:1 ratio) was added K2CO3 (4.423 g, 32.0 mmol), followed by PXPd (215 mg, 0.40 mmol). The resulting suspension was vigorously stirred in a 70° oil bath for 35 min. After cooling down to RT, the dark brown solution was diluted with water (200 mL), and extracted with EtOAc (200 mL×2). The combined EtOAc extracts were washed with brine, dried (Na2SO4) and concentrated. The residue was chromatographed (silica gel) eluting with EtOAc/hexane (0-30%) to afford the title compound (2.977 g, 79%) as a light brown solid.

1. extractionextracted with EtOAc (200 mL×2)
2. washThe combined EtOAc extracts were washed with brine
3. dry with materialdried (Na2SO4)
4. concentrationconcentrated
5. customThe residue was chromatographed (silica gel)
6. washeluting with EtOAc/hexane (0-30%)