Intramolecular cycloaddition reactions are central in the total syntheses of colombiasin A (1) and elisapterosin B (2) described, which use (−)‐dihydrocarvone as the starting material. A Moore rearrangement of a vinylcyclobutene is used to initiate the cycloaddition.
Intramolekulare Cycloadditionsreaktionen spielen bei den beschriebenen Totalsynthesen von Colombiasin A (1) und Elisapterosin B (2), die von (−)‐Dihydrocarvon ausgehen, eine entscheidende Rolle. Als Auslöser der Cycloaddition fungiert die Moore‐Umlagerung eines Vinylcyclobutens.
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