反应详情

Combine 30 g (0.12 mol) of the product from Example 1 with 150 g of "activated" manganese dioxide in 500 ml of methylene chloride, and heat to reflux for 6 hr. Filter off the solids and remove the solvent in vacuo. The residue is crystallized from ether to provide the title compound.

1. temperatureto reflux for 6 hr
2. filtrationFilter off the solids
3. customremove the solvent in vacuo
4. customThe residue is crystallized from ether