The synthesis of kermesic acid and isokermesic acid derivatives and of related dihydroxyanthraquinones

SJ Bingham, JHP Tyman

Index: Bingham, Stephen J.; Tyman, John H. P. Journal of the Chemical Society - Perkin Transactions 1, 1997 , # 24 p. 3637 - 3642

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Citation Number: 18

Abstract

Cochinellic anhydride methyl, ethyl and benzyl esters (4-methoxy-4-ethoxy-and 4-benzyloxy- carbonyl-5-hydroxy-3-methylphthalic anhydrides) have been prepared by a single stage Diels–Alder reaction of 2-bromomaleic anhydride with 3-alkoxycarbonyl-2, 4-bis ( ...