PdCl<sub>2</sub>-Catalyzed Oxidative Cycloisomerization of 3-Cyclopropylideneprop-2-en-1-ones
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Abstract
A novel PdCl<sub>2</sub>-catalyzed oxidative cycloisomerization of 3-cyclopropylideneprop-2-en-1-ones, providing a facile synthesis of highly strained functionalized 2-alkylidenecyclobutanones via furan-fused cyclobutene intermediates, is reported. An interesting route to 2(3<i>H</i>)-furanones with a spiro-cyclopropane unit from the obtained 2-alkylidenecyclobutanones via a ring-contraction rearrangement reaction is also realized