Examination of several solid acid catalysts of different nature (acid resins, zeolites, mixed oxides, Nb-oxide, and Nb-phosphate) was performed for the direct iodination reaction of phenol by using molecular iodine. The experiments were carried out in mild and green conditions (50 °C at ambient pressure) in methanol in the presence of H2O2 as oxidant agent. Iodine was introduced in reduced amount, stoichiometric for the formation of di-iodinated phenol, to obtain information on the regio-selectivity of the iodination reaction. The catalysts proved to be all efficient for the introduction of iodine into the aromatic substrate, yielding mono-, di-, and tri-iodo derivates. Different selectivity distributions to the iodo-compound formed were observed over the different catalysts. Catalysts could be grouped into distinct families on the basis of their ortho/para orientation.

Direct Green Iodination of Phenol over Solid Acids / P. Carniti, S. Colonna, A. Gervasini. - In: CATALYSIS LETTERS. - ISSN 1011-372X. - 137:1-2(2010), pp. 55-62. [10.1007/s10562-010-0283-6]

Direct Green Iodination of Phenol over Solid Acids

P. Carniti
Primo
;
S. Colonna
Secondo
;
A. Gervasini
Ultimo
2010

Abstract

Examination of several solid acid catalysts of different nature (acid resins, zeolites, mixed oxides, Nb-oxide, and Nb-phosphate) was performed for the direct iodination reaction of phenol by using molecular iodine. The experiments were carried out in mild and green conditions (50 °C at ambient pressure) in methanol in the presence of H2O2 as oxidant agent. Iodine was introduced in reduced amount, stoichiometric for the formation of di-iodinated phenol, to obtain information on the regio-selectivity of the iodination reaction. The catalysts proved to be all efficient for the introduction of iodine into the aromatic substrate, yielding mono-, di-, and tri-iodo derivates. Different selectivity distributions to the iodo-compound formed were observed over the different catalysts. Catalysts could be grouped into distinct families on the basis of their ortho/para orientation.
Iodination; Phenol; Solid acids
Settore CHIM/06 - Chimica Organica
Article (author)
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/143212
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 6
  • ???jsp.display-item.citation.isi??? 6
social impact