反应详情

The product from Example 28E (2 g, 2.79 mmol) was dissolved in a mixture of THF (15 mL), ethanol (15 mL), and ethyl acetate (5 mL) then platinum oxide (0.254 g, 1.12 mmol) was added via THF slurry. The flask was evacuated and purged with nitrogen twice, then evacuated and opened to hydrogen balloon. The mixture was stirred at room temperature for 20 h, then filtered through celite, concentrated, and purified by chromatography on silica gel with an 80 g column, eluting with 0-40% ethyl acetate/dichloromethane to give the first peak of trans product 0.508 g (28%).

1. customThe flask was evacuated
2. custompurged with nitrogen twice
3. customevacuated
4. filtrationfiltered through celite,
5. concentrationconcentrated
6. custompurified by chromatography on silica gel with an 80 g column
7. washeluting with 0-40% ethyl acetate/dichloromethane