C(OC([N:6]1[CH2:14][C:13]2[C:8](=[CH:9][CH:10]=[CH:11][C:12]=2[CH2:15][OH:16])[CH2:7]1)=O)C.[OH-].[K+]>C(O)(C)C.O>[OH:16][CH2:15][C:12]1[CH:11]=[CH:10][CH:9]=[C:8]2[C:13]=1[CH2:14][NH:6][CH2:7]23.03 g of 2-ethoxycarbonyl-4-hydroxymethylisoindoline and 2.91 g of potassium hydroxide were dissolved in a mixture of 25 ml isopropyl alcohol and 2.5 ml of water. The mixture was heated under refluxing for 3 days. After the addition of water, the resulting reaction mixture was extracted with chloroform. The extract was washed with brine, concentrated, and recrystallized from carbontetrachloride to give 1.48 g of 4-hydroxymethylisoindoline.
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