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Identifier 000416550
Title Φορμυλίωση αλκοολών και αμινών μέσω αεροβικής οξειδωτικής σύζευξης με φορμαλδεύδη καταλυόμενη από νανοσωματίδια χρυσού
Alternative Title Formylation of alcohols and amines via aerobic oxidative coupling with for-maldehyde catalysed by gold nanoparticles
Author Μεταξάς, Ιωάννης Μ.
Thesis advisor Στρατάκης, Μανώλης
Reviewer Σμόνου, Ιουλία
Βασιλικογιαννάκης, Γεώργιος
Abstract In the present scientific dissertation two simple protocols for the synthesis of formate esters and formamides with aerobic coupling between alcohols or amines with formaldehyde catalyzed by Au/TiO2 are presented. The suitable form of formaldehyde is paraformaldehyde, as the trimeric 1,3,5-trioxane is inactive under the reaction’s conditions. The reaction’s mechanism proceeds through the formation of a hemiacetal or hemiaminal intermediate, respectively, followed by it’s aerobic oxidation catalyzed by Au nanoparticles. For the alcohols the oxidative coupling with paraformaldehyde is unprecedented. Typically 3 equivalents of paraformaldehyde are required and heating to 80 οC with reaction times ranging from 10 to 24 h. Typically for the amines the oxidative coupling with paraformaldehyde requires 4-5 h in room temperature with 2-3 equivalents of paraformaldehyde. Adition of base is not necessary in contrast with analogous coupling reactions in the literature. The catalyst is recyclable and can be reused after a simple filtration up to 5 consecutive runs with a small loss of activity.
Language Greek
Subject Aerobic coupling
Au nanoparticles
Αεροβική σύζευξη
Νανοσωματίδια χρυσού
Φορμικοί εστέρες
Issue date 2018-07-18
Collection   School/Department--School of Sciences and Engineering--Department of Chemistry--Post-graduate theses
  Type of Work--Post-graduate theses
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