Mono- and bi-functional heterogeneous catalytic transformations of terpenes and terpenoids (Articolo in rivista)

Type
Label
  • Mono- and bi-functional heterogeneous catalytic transformations of terpenes and terpenoids (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1023/B:TOCA.0000013550.28170.6a (literal)
Alternative label
  • Ravasio N.; Zaccheria F.; Guidotti M.; Psaro R. (2004)
    Mono- and bi-functional heterogeneous catalytic transformations of terpenes and terpenoids
    in Topics in catalysis; Elsevier, Amsterdam (Paesi Bassi)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Ravasio N.; Zaccheria F.; Guidotti M.; Psaro R. (literal)
Pagina inizio
  • 157 (literal)
Pagina fine
  • 168 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 27 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 12 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • a CNR-Istituto di Scienze e Tecnologie Molecolari, Via Golgi 19, 20133 Milano, Italy b Università di Milano, Dipartimento di Chimica Inorganica Metallorganica e Analitica, Via Venezian 21, 20133 Milano, Italy (literal)
Titolo
  • Mono- and bi-functional heterogeneous catalytic transformations of terpenes and terpenoids (literal)
Abstract
  • Selective reactions of terpenes, catalyzed by different heterogeneous systems, are reported. ?-pinene and limonene epoxides can be effectively isomerized to carbonyl compounds (selectivity >70%) over silica aluminas that appear to be good alternatives to homogeneous ZnBr2. The different reactivity of geometric isomers can be used to separate them. Unsaturated ketones can be converted through a two-step one-pot reaction in cyclic or bicyclic ethers through a bifunctional process involving a hydrogenation and an acid-catalyzed step. However, the choice of the solvent allows to inhibit the acidic sites, thus obtaining a selective hydrogenation reaction. On the other hand, the acidic reaction alone can be useful for alcohol epimerization and epimer separation. Grafting of Ti in a siliceous matrix gives rise to a material with both redox and acidic properties. Solids obtained in this way are active and selective in the epoxidation of terpenic alcohols but can also promote bifunctional reactions. (literal)
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