反应详情

To a room temperature mixture of 5 g of product from Example 110 in 80 ml of methylene chloride and 5 drops of dimethylformamide is added 2.72 g of oxalyl chloride. The reaction is stirred at room temperature for 2.5 days and concentrated in vacuo. The residue is dissolved in diethyl ether, passed through a pad of diatomaceous earth and concentrated in vacuo to give 5.27 g of the desired product as colorless crystals.

1. concentrationconcentrated in vacuo
2. dissolutionThe residue is dissolved in diethyl ether
3. concentrationconcentrated in vacuo