Method for producing cyclopent-4-ene-1, 3-diol or cyclopent-4-ene-1, 3-diol derivatives

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The invention relates to a method for producing cis-cyclopent-4-ene-1, 3-diol and cis-cyclopent-4-ene-1, 3-dialkanoates by selective cis-1, 2-reduction of 4-hydroxycyclopent-2-enone by means of a hydroboron, in the presence of substoichiometric quantities of a trivalent rare earth metal compound, to form cyclopent-4-ene-1, 3-diol which can then be optionally reacted with an acylation agent to form cis-cyclopent-4-ene-1, 3-dialkanoates, in order to simplify the reprocessing and without intermediate isolation.