反应详情

The benzyl glycoside 51 (385 mg, 0.235 mmol) was dissolved in MeOH (5 mL) and chloroform (5 mL). Palladium on charcoal (5%, 538 mg) was added. The mixture was stirred under hydrogen at 100 psi for 3 days. TLC indicated complete conversion. The mixture was filtered through a plug of Celite and rinsed with EtOAc (5×1 mL). The combined filtrate and washings were evaporated to dryness, co-evaporated with DCM (3 mL) to give the hemiacetal 52 as pale-yellow foam (338 mg, 93%), used without further purification or characterization in the next step.

1. filtrationThe mixture was filtered through a plug of Celite
2. washrinsed with EtOAc (5×1 mL)
3. customThe combined filtrate and washings were evaporated to dryness, co-evaporated with DCM (3 mL)