[CH2:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH2:3][CH:2]1[C:10](=O)[CH3:11].[NH3:13].[BH4-].[Na+].C(O)(=O)C>CO>[CH2:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH2:3][CH:2]1[CH:10]([NH2:13])[CH3:11]1-(2,3-dihydro-1H-inden-2-yl)ethanone (44 mg, 0.275 mmol) was dissolved in methanol (2 mL), and 7 M methanolic ammonia was added (1 mL, 7 mmol). This was allowed to stir at rt for 4 h, at which time sodium borohydride (31 mg, 0.824 mmol) and a catalytic drop of glacial acetic acid was added. Stirring continued for 14 h at rt, after which time the solvent was removed in vacuo. The residue was taken up in ethyl acetate and washed with a small amount of 10% aqueous sodium carbonate, dried with magnesium sulfate, and concentrated. The residue was then taken on in subsequent reactions without further purification or characterization.
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