Synthesis and optimization of tempo based polymeric oxidation catalysts

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Thesis Type: Postgraduate

Institution Of The Thesis: Middle East Technical University, Faculty of Arts and Sciences, Department of Chemistry, Turkey

Approval Date: 2002

Thesis Language: English

Student: Ayşegül Tosun

Supervisor: CİHANGİR TANYELİ

Abstract:

ree nitroxyl radicals are popular in alcohol oxidation reactions as catalysts. The most useful ones are TEMPO (2,2,6,6-tetramethylpiperidinoxyl) derivatives. In this thesis, TEMPO based polymeric catalyst systems were synthesized. The most important property of these catalysts are being homogeneous and recyclable systems. In the synthetic strategy, the monomer systems which are needed for polymerization were synthesized from easily available norbornene derivatives via Mukaiyama and DCC coupling reactions. The resultant one and two TEMPO unit containing systems were polymerized in a controlled way by ROMP (Ring Opening Metathesis Polymerization). The activity test of these new catalysts were done by the oxidation of several primary alcohols. The yields and time for transformation were determined by the help of gas chromatography. All the products were identified by ^-NMR, 13C-NMR, MS and IR spectroscopy.