反应详情

A solution of α-acetoxy-3,4,5-trimethoxyphenyl-acetic acid (5.0 g) in dichloromethane (40 ml) was reacted with 1,1′-carbonyldiimidazole (2.92 g) at room temperature for 30 minutes. The solution was refluxed for 30 minutes, after which 2-isopropoxy-3-methoxy-N-methylbenzylamine (3.26 g) dissolved in dichloromethane (10 ml) was added. The mixture was stirred at room temperature for 2 hours, after which it was washed with aqueous hydrochloric acid (20 ml, is 1M) followed by aqueous sodium hydrogen carbonate (20 ml, 0.5 M). The organic phase was dried and concentrated to dryness, leaving crude 2-(3,4,5-trimethoxyphenyl)-2-acetoxy-N-methyl-N-(2-isopropoxy-3-methoxybenzyl)acetamide (7.27 g).

1. temperatureThe solution was refluxed for 30 minutes
2. additionwas added
3. washafter which it was washed with aqueous hydrochloric acid (20 ml, is 1M)
4. customThe organic phase was dried
5. concentrationconcentrated to dryness