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Identifier 000460101
Title Στερεοεκλεκτική αρυλίωση σίλυλο αλκενίων καταλυόμενη από νανοσωματίδια Pd
Alternative Title Stereoselective arylation of alkenyl silanes, catalyzed by Pd nanoparticles
Author Κυριακάκης, Γεώργιος Ε.
Thesis advisor Στρατάκης, Μανώλης
Reviewer Βασιλικογιαννάκης, Γεώργιος
Νεοχωρίτης, Κωνσταντίνος
Abstract In contrast to their germyl-analogues, which in the presence of catalytic amounts of Pd nanoparticles [generated from [Pd2dba3/Ag(I)] undergo with aryl iodides C-C coupling on the C-Ge bonds, cis-1,2-di-trimethylsilylarylethylenes operate exclusively via a stereoselective Mizoroki-Heck arylation pathway, leading to trans-di- trimethylsilyldiarylethylenes. trans-1,2-di-Trimethylsilylarylethylenes are completely unreactive under standard reaction conditions. The reaction tolerates the presence of boryl, silyl or bromine substituents on the aryl iodides. From the mechanistic point of view, the process involves syn-arylpalladation followed by syn-dehydropalladation. Contrary, the Pd nanoparticle-catalyzed arylation of trimethyl-[(E)-2- arylethenyl]silanes procced exclusively via a stereoselective Hiyama pathway on the C-Si bond, yielding trans-di-arylethylenes. Mechanistically, this pathway involves syn- arylpalladation followed by an E2 elimination.
Language Greek
Subject Catalysis
Hiyama
Mizoroki-Heck
Κατάλυση
Issue date 2023-11-23
Collection   School/Department--School of Sciences and Engineering--Department of Chemistry--Post-graduate theses
  Type of Work--Post-graduate theses
Permanent Link https://elocus.lib.uoc.gr//dlib/a/9/9/metadata-dlib-1698940174-518826-21892.tkl Bookmark and Share
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