Intramolecular Diels-Alder reaction (IMDA) precursors are easily available starting from addition of ester functionalized zinc-copper reagents to cyclohexadienyl- and cycloheptadienylirontricarbonyl cation salts. The resulting cyclic 1,3-dienes containing an α,β-unsaturated ester functionality underwent smoothly IMDA reaction to afford bridged tricyclic compounds. Bridged heterotricyclic skeletons were also available via IMDA reaction of cyclic 1,3-dienes bearing an imine or aldehyde functionality.
- Bridged-tricyclic compound
- Cyclic 1,3-diene
- Intramolecular Diels-Alder reaction
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