[NH2:1][CH2:2][C:3]1[C:10]([CH3:11])=[CH:9][C:6]([CH2:7][OH:8])=[CH:5][C:4]=1[CH3:12].C(=O)([O-])[O-].[K+].[K+].[C:19](Cl)(=[O:21])[CH3:20]>C(OCC)(=O)C.O>[OH:8][CH2:7][C:6]1[CH:9]=[C:10]([CH3:11])[C:3]([CH2:2][NH:1][C:19](=[O:21])[CH3:20])=[C:4]([CH3:12])[CH:5]=1To a solution of 4-aminomethyl-3,5-dimethylbenzyl alcohol (2.3 g) in ethyl acetate (70 ml) was added a solution of potassium carbonate (2.0 g) in water (35 ml). To this solution was added acetyl chloride (0.95 ml) under ice-cooling. This mixture was stirred at room temperature for 1 hr. The reaction mixture was extracted with ethyl acetate, washed with saturated brine and dried over anhydrous magnesium sulfate. The solvent was evaporated and the obtained residue was recrystallized from methanol-ethyl acetate to give the title compound (2.0 g) as white crystals, m.p.=193.5-194.5° C.
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