[I:1][C:2]1[CH:10]=[CH:9][CH:8]=[C:4]([C:5]([OH:7])=O)[C:3]=1[C:11]([OH:13])=[O:12]>C(OC(=O)C)(=O)C>[I:1][C:2]1[C:3]2[C:11](=[O:12])[O:13][C:5](=[O:7])[C:4]=2[CH:8]=[CH:9][CH:10]=1A solution of 3-iodophthalic acid (0.9 g, 3.08 mmol) in acetic anhydride (5 mL) was heated to reflux under nitrogen overnight. After cooling, the solvent was removed in vacuo and the residue purified by trituration with ethanol to give 4-iodo-2-benzofuran-1,3-dione (0.55 g, 65%).
불러오는 중…