反应详情

To a solution of catechol (5 g, 45 mmol) in Et2O (187 mL) cooled to 0° C. was added dropwise fuming HNO3 (2 mL). After addition, the reaction was allowed to stand at rt overnight, and the Et2O was removed by evaporation under reduced pressure. The residue was triturated with pentane (3×), and the combined organics were dried (Na2SO4), filtered, and concentrated under reduced pressure. The residue was chromatographed (silica gel) eluting with 10%-20% EtOAc/hexane to give the title compound (2.94 g).

1. additionAfter addition
2. customthe Et2O was removed by evaporation under reduced pressure
3. customThe residue was triturated with pentane (3×)
4. dry with materialthe combined organics were dried (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customThe residue was chromatographed (silica gel)
8. washeluting with 10%-20% EtOAc/hexane