A convenient synthesis of dicarboxylic monoesters using isopropenyl esters: synthesis of oxaunomycin derivatives

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Abstract
Reaction of various types of alcohols with a novel type of acylating agent, the isopropenyl esters 2a–e in the presence of a catalytic amount of conc. sulfuric acid or toluene-p-sulfonic acid followed by selective deprotection of the terminal ester gives the monoesters 5a–i in good yields.

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