Biphase and triphase catalysis. Arsonated polystyrenes as catalysts for epoxidation of olefins by aqueous hydrogen peroxide

1979 ◽  
Vol 101 (23) ◽  
pp. 6946-6950 ◽  
Author(s):  
Stephen E. Jacobson ◽  
Frank Mares ◽  
Patrick M. Zambri
Keyword(s):  
Hydrogen Peroxide ◽  
Aqueous Hydrogen Peroxide ◽  
Triphase Catalysis ◽  
Epoxidation Of Olefins

Supramolecular concepts for the biphasic epoxidation of olefins using aqueous hydrogen peroxide

2021 ◽  
Author(s):  
Fabian Schmidt ◽  
Mirza Cokoja
Keyword(s):  
Hydrogen Peroxide ◽  
Phase Transfer ◽  
Aqueous Hydrogen Peroxide ◽  
Special Regard ◽  
Epoxidation Of Olefins

We present an overview of supramolecular strategies for epoxidations of hydrophobic olefins in water using phase-transfer controlling surfactants, with special regard to the rationale of phase transfer and the efficiency...

Asymmetric epoxidation of olefins catalyzed by Ti(salan) complexes using aqueous hydrogen peroxide as the oxidant

2008 ◽  
Vol 80 (5) ◽  
pp. 1071-1077 ◽  
Author(s):  
Kazuhiro Matsumoto ◽  
Yuji Sawada ◽  
Tsutomu Katsuki
Keyword(s):  
Hydrogen Peroxide ◽  
Phosphate Buffer ◽  
Asymmetric Epoxidation ◽  
High Yield ◽  
Aqueous Hydrogen Peroxide ◽  
Isolation And Purification ◽  
Epoxidation Of Olefins

Ti(salan) complexes were found to be efficient catalysts for asymmetric epoxidation with aqueous hydrogen peroxide as the oxidant. In the presence of pH 7.4 phosphate buffer, the reaction of various conjugate olefins proceeded smoothly to afford the corresponding epoxides in high yield with high enantioselectivity, even on a multigram scale. Ti(salan) complexes could be prepared from Ti(OiPr)4 and the corresponding salan ligand and directly used without isolation and purification.

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