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Synthesis of ‘three-petal’ carbocyclic systems based on s-cis-diferrocenyltrienes
Abstract:Acid-catalyzed intramolecular, homoannular alkylation of one of the ferrocenyl substituents in spirocyclodimers derived from 1,3-bis(ferrocenylmethylidene)-2-methylidene-cyclohexane, -cycloheptane, and 3,5-bis(ferrocenylmethylidene)-4-methylidene-N-methylpiperidine results in a fused system with a ‘three-petal’ moiety in the center. The structure of 1-ferrocenyl-3,11-bis(ferrocenylmethylidene)-2,3,4,5,6,6b,10,10a,11,12,13,14-dodecahydro-1H-benzod](ferrocenoa])phenanthrene was established by X-ray diffraction analysis.
Keywords:s-cis-Diferrocenyltrienes  Homoannular alkylation  Spirocyclodimers  Fragmentation  X-ray diffraction analysis  Ferrocene
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