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Journot, Guillaume

Nom
Journot, Guillaume
Affiliation principale
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https://libra.unine.ch/handle/123456789/390

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  • Publication
    Accès libre
    Catalytic Hydrogenation of meso-Octamethylporphyrinogen (Calix[4]pyrrole)
    (2010)
    Journot, Guillaume 
    ;
    Letondor, Christophe
    ;
    Neier, Reinhard 
    ;
    Stoeckli-Evans, Helen 
    ;
    Diego Savoia
    ;
    Andrea Gualandi
    Hydrogenation of meso-octamethylporphyrinogen (calix[4]pyrrole) with a number of heterogeneous catalysts under different experimental conditions has been investigated. GC-MS analyses of the reaction mixtures showed the formation of one to four products in low to moderate yields: three of them were diastereoisomers of the product derived from half-hydrogenation of the substrate, and displayed alternating pyrrolidine and pyrrole rings, while the fourth was the all-cis saturated product. An acidic medium was necessary to achieve hydrogenation. However, the use of too strongly acidic solvents or additives was detrimental to the stability of the substrate and/or the catalyst.