反应详情

A solution of Example 420B (2.2 g) and p-toluenesulfonic acid (100 mg) in acetone (10 mL) was heated to reflux for 10 hours, filtered through a pad of silica gel (20 g), and concentrated to provide the desired product.

1. temperatureto reflux for 10 hours
2. filtrationfiltered through a pad of silica gel (20 g)
3. concentrationconcentrated