No templates needed: The title reaction makes it easy to construct the bicyclo[6.3.0]undecadienone framework in high yields (see scheme). A template effect is not required to achieve this ring-closing reaction efficiently. The present method can be applied to the construction of bicyclo[5.3.0] and bicyclo[4.3.0] ring systems. Ts = p-toluenesulfonyl.

Ohne Templat: Die Titelreaktion führt leicht und in hohen Ausbeuten zu Bicyclo[6.3.0]undecadienonen (siehe Schema), wobei der Ringschluss auch ohne Templateffekt effizient abläuft. Die vorgestellte Methode kann zum Aufbau von Bicyclo[5.3.0]‐ und Bicyclo[4.3.0]‐Ringsystemen verwendet werden. Ts=p‐Toluolsulfonyl.

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