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Synthesis of caulersin and its isomers by reaction of indole-2, 3-dicarboxylic anhydrides with methyl indoleacetates

Y Miki, Y Aoki, H Miyatake, T Minematsu, H Hibino

Index: Miki, Yasuyoshi Heterocycles, 1997 , vol. 45, # 6 p. 1143 - 1150

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Citation Number: 22

Abstract

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