Reactions of keten acetals. Part I. A simple synthesis of some naturally occurring anthraquinones

J Banville, JL Grandmaison, G Lang…

Index: Banville,J. et al. Canadian Journal of Chemistry, 1974 , vol. 52, p. 80 - 87

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Citation Number: 50

Abstract

A study of the condensation of keten acetals with some halonaphthoquinones has led to the simple and regiospecific synthesis of some naturally occurring anthraquinones: catenarin, helminthosporin, emodin, and chrysophanol. The results show unambiguously that a previously proposed mechanism is erroneous. The reaction of these acetals with chloromaleic anhydride also provided a one-step preparation of some substituted phthalic ...

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