3‐Alkyl‐1,2,4‐cyclopentanetriones can readily be converted to all trans 2,3‐dialkyl‐1,4‐cyclopentanediols. The latter compounds are intermediates for the synthesis of a prostanoid synthon, known as Corey's lactone, when the alkyl substituents contain appropriate functional groups. The conversion of two different sets of side‐chains to readily distinguishable two‐carbon and one‐carbon aldehyde units is described. Extensive 1H‐NMR data are included.
Aus dem Cyclopentantrion (I) kann nach bekannten Verfahren das Ketal (II) erhalten werden, das mit Crotylbromid über die Organozinkverbindung zu (III) kondensiert wird.
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