反应详情

A screw-cap vial was charged with 66.31A (0.556 g, 1.94 mmol), THF (10 mL), 66.56A (0.500 g, 1.29 mmol), potassium phosphate (0.824 g, 3.88 mmol), 2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl (commercially available from Aldrich) (0.165 g, 0.401 mmol), palladium(II) acetate (0.0291 g, 0.129 mmol), and water (0.117 mL, 6.47 mmol). The mixture was purged with argon and stirred for 48 hours at room temperature under an argon balloon. Additional 2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl (0.165 g, 0.401 mmol), palladium(II) acetate (0.0291 g, 0.129 mmol), and 69.31A (0.556 g, 1.94 mmol) were added, and stirring was continued for 16 hours at room temperature under argon. The mixture was filtered through silica gel (EtOAc) and concentrated. The crude product was purified by silica gel flash chromatography (0-5% EtOAc/hexane) to afford 69.31B (0.300 g, 58% yield) as a colorless oil.

1. customThe mixture was purged with argon
2. stirringstirring
3. waitwas continued for 16 hours at room temperature under argon
4. filtrationThe mixture was filtered through silica gel (EtOAc)
5. concentrationconcentrated
6. customThe crude product was purified by silica gel flash chromatography (0-5% EtOAc/hexane)