反应详情

To a solution of 1B (1.636 g, 5 mmol) in DCE (16 mL) at RT was added benzaldehyde (1 mL, 10 mmol), followed by NaB(OAc)3H (2.97 g, 14 mmol) and AcOH (0.6 mL, 10 mmol). The reaction mixture was stirred at RT for 16 h, then quenched with aqueous NaHCO3 (40 mL) and extracted with CH2Cl2 (50 mL×3). The combined extracts were washed with brine, dried (Na2SO4), and concentrated. The resulting residue was chromatographed (silica gel) eluting with 0-20% of EtOAc in hexane to give the title compound (1.70 g, 81%) as a white foam.

1. customquenched with aqueous NaHCO3 (40 mL)
2. extractionextracted with CH2Cl2 (50 mL×3)
3. washThe combined extracts were washed with brine
4. dry with materialdried (Na2SO4)
5. concentrationconcentrated
6. customThe resulting residue was chromatographed (silica gel)
7. washeluting with 0-20% of EtOAc in hexane