[CH3:1][C:2]([NH:15]C(=O)C)([CH3:14])[CH2:3][C:4]1[CH:13]=[CH:12][C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[CH:5]=1.Cl.[OH-].[Na+]>O>[CH3:14][C:2]([NH2:15])([CH3:1])[CH2:3][C:4]1[CH:13]=[CH:12][C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[CH:5]=1To N-[2-methyl-1-(naphthalen-2-yl)propan-2-yl]acetamide (26 mg) obtained in Step 8 was added 6N hydrochloric acid (2 ml) and the mixture was heated under reflux for 5 hr. The reaction mixture was poured into water, made basic with a 4N aqueous sodium hydroxide solution, and extracted with diethyl ether. The organic layer was washed with water, dried over potassium carbonate and concentrated under reduced pressure to give the title compound (19 mg).
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