反应详情

A solution of Example 236B (0.168 g, 0.51 mmol), 30% hydrogen peroxide (0.25 mL, 2.2 mmol), and lithium hydroxide monohydrate (0.042 g, 1.0 mmol) in 3:1 tetrahydrofuran/water (7 mL) was stirred in an ice bath for 3 hours, then concentrated. The residues were taken up in water and the pH adjusted to 10 with NaOH. The solution was washed twice with ether, adjusted to pH 2 with HCl, then extracted twice with ethyl acetate. The ethyl acetate extracts were dried (MgSO4), filtered, then concentrated to provide the desired product.

1. concentrationconcentrated
2. washThe solution was washed twice with ether
3. extractionextracted twice with ethyl acetate
4. dry with materialThe ethyl acetate extracts were dried (MgSO4)
5. filtrationfiltered
6. concentrationconcentrated