A simple and efficient Michael addit ion of isatin to acrylate in the presence of KOH was described. Methyl β-(2,3-dioxoindolin-1-yl) propanoate was synthesized firstly by the addition of isatin to methyl acrylate in a feasible approach using 10% KOH as catalyst in DMF with the highest yield of 72.5% under the optimized conditions. A series of β-(2,3-dioxoindolin-1-yl) propanoate derivatives was synthesized according to this approach and gave moderate to relative high yields. The directive distinct color changes in this reaction were illuminated by the reaction mechanism analysis.
描述了在 KOH 存在下
靛红与
丙烯酸酯的简单有效的迈克尔加成反应。以10% KOH为催化剂,在
DMF中,首先通过
靛红与
丙烯酸甲酯加成合成了β-(2,3-二氧
吲哚啉-1-基)
丙酸甲酯,在优化条件下,收率最高为72.5%。根据该方法合成了一系列β-(2,3-二氧
吲哚啉-1-基)
丙酸酯衍
生物,并具有中等至相对较高的产率。反应机理分析阐明了该反应中指示性的明显颜色变化。