反应详情

To a solution of 30.0 g of product from Example 32 in 300 ml of methylene chloride and 10 drops of dimethylformamide is added, dropwise, 14.62 g of oxalyl chloride. The reaction is stirred at room temperature for 18 hours and concentrated in vacuo. The residue is dissolved in diethyl ether, filtered through diatomaceous earth and concentrated to give 3.12 g of the desired product as yellow crystals.

1. concentrationconcentrated in vacuo
2. dissolutionThe residue is dissolved in diethyl ether
3. filtrationfiltered through diatomaceous earth
4. concentrationconcentrated