[C@@H:1]1([N:10](C)[C:11](=O)OC(C)(C)C)[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH2:3][CH2:2]1.[ClH:19]>CO>[ClH:19].[CH3:11][NH:10][C@@H:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH2:3][CH2:2]1To a solution of tert-butyl(1S)-2,3-dihydro-1H-inden-1-yl(methyl)carbamate (1.84 g, 7.44 mmol) in MeOH (50.0 mL) under an atmosphere of nitrogen was added hydrochloric acid (6.00 mL, 72.4 mmol) and the mixture was stirred overnight. The reaction was concentrated in vacuo to afford the title compound as a white solid without further purification (1.35 g, 99%). LC/MS: Rt=0.85 min, ES+ 148 (AA standard).
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