Oxidative Deprotection of Trimethylsilyl Ethers and Coupling of Thiols to Disulfides by Cr (VI) and Fe (III) Heterogeneous Nanocatalysts

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Kakeshpour, Tayeb | 2012

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 43334 (03)
University: Sharif University of Technology
Department: Chemistry
Advisor(s): Saeedi, Mohammad Reza; Rajabi, Fateme
Abstract:
Considering the advantages of heterogeneous catalysts for the easy work up procedure, being eco-friendly, and the reusability, herein, two projects are carried out by metal-supported SBA-15 catalysts. The first one is the oxidative deprotection of trimethylsilyl ethers catalyzed Cr (VI) in the presence of TBHP as oxidant. In this project, trimethylsylil ethers are oxidized in good to high yields. The second project is the oxidative coupling of thiols to disulfides catalyzed by Fe (III) in the presence of hydrogenperoxide. This catalyst/oxidant system convets different aromatic thiols to corresponding disulfides efficiently
Keywords:
Thiols ; Trimethyl Silyl Ether ; Disulfides ; SBA Silica ; Iron Catalysis (III) ; Chromium Catalysis (VI)

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