Synthesis of fused oxabicyclic systems by metal-catalyzed intramolecular addition of 1,3-cycloalkyldiones to alkynes.
2003
Readily available 4-propargyl-1,3-cyclohexanediones and cyclopentanediones can be chemo- and regioselectively cycloisomerized to synthetically appealing fused oxabicyclic systems by simply stirring at room temperature with catalytic amounts of an appropriate metal complex.
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