Synthesis of caulersin and its isomers by reaction of indole-2,3-dicarboxylic anhydrides with methyl indoleacetates
作者:Yasuyoshi Miki、Yosiyuki Aoki、Hideaki Miyatake、Toshie Minematsu、Hajime Hibino
DOI:10.1016/j.tetlet.2006.04.157
日期:2006.7
1-Benzenesulfonylindole-2,3-dicarboxylic anhydride was reacted with methyl 1-benzenesulfonylindole-2-acetate to give the corresponding 2-acylindole-3-carboxylic acid as the sole product in high yield, which could be converted to caulersin in four steps. In a similar manner, three isomers A, B, and C were synthesized by reaction of indole-2,3-dicarboxylic anhydrides with methyl indoleacetates.
使1-苯磺酰基吲哚-2,3-二羧酸酐与1-苯磺酰基吲哚-2-乙酸甲酯反应,以高收率得到相应的2-酰基吲哚-3-羧酸为唯一产物,该产物可通过四步转化为花椰菜素。以类似的方式,通过吲哚-2,3-二羧酸酐与吲哚乙酸甲酯的反应合成了三种异构体A,B和C。