反应详情

A solution of (3aR,5S,6aR)-5-(2,2-dimethyl-1,3-dioxolan-4-yl)-2,2-dimethyl-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]dioxole (compound 1b, 10.0 g, 40.9 mmol) in 60% HOAc in water (20 mL) was stirred at 40° C. for 16 hours. The reaction mixture was adjusted to pH 8˜8.5 by saturated NaHCO3 solution and extracted with EtOAc. The organic layer was combined and concentrated, the residue was purified by column chromatography on silica gel (eluting with 1:2 EtOAc in petroleum ether) to afford 5.2 g of (1S)-1-[(3aR,5S,6aR)-2,2-dimethyl-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]dioxol-5-yl]ethane-1,2-diol (compound 1c). MS obsd. (ESI+) [(M+NH4)+]: 222.

1. extractionextracted with EtOAc
2. concentrationconcentrated
3. customthe residue was purified by column chromatography on silica gel (eluting with 1:2 EtOAc in petroleum ether)