反应详情

To a solution of 6-hydroxy-1,2,3,4-tetrahydronaphthalene-2-carboxylic acid (0.5 g, 3 mmol) in methanol (6 mL, 200 mmol) was added sulfuric acid (0.05 g, 0.5 mmol) and stirred over weekend. After concentration, the residue was dissolved in EtOAc and washed with water, brine and dried over Na2SO4 to give the pure product as a white solid (0.55 g, 100%). LCMS: Rt=1.17 min, m/z=207.00 [M+], 100%.

1. concentrationAfter concentration
2. dissolutionthe residue was dissolved in EtOAc
3. washwashed with water, brine
4. dry with materialdried over Na2SO4