Asymmetric Epoxidation of Olefins with Hydrogen Peroxide by an in Situ-Formed Manganese Complex

2014 ◽  
Vol 79 (14) ◽  
pp. 6688-6694 ◽  
Author(s):  
Wen Dai ◽  
Sensen Shang ◽  
Bo Chen ◽  
Guosong Li ◽  
Lianyue Wang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Manganese Complex ◽  
Asymmetric Epoxidation ◽  
Epoxidation Of Olefins

ChemInform Abstract: Asymmetric Epoxidation of Olefins with Hydrogen Peroxide by an in situ-Formed Manganese Complex.

ChemInform ◽  
2014 ◽  
Vol 46 (2) ◽  
pp. no-no
Author(s):  
Wen Dai ◽  
Sensen Shang ◽  
Bo Chen ◽  
Guosong Li ◽  
Lianyue Wang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Manganese Complex ◽  
Asymmetric Epoxidation ◽  
Epoxidation Of Olefins

Epoxidation of Olefins Catalyzed by Polyoxomolybdates Formed in-situ in Ionic Liquids

2013 ◽  
Vol 68 (10) ◽  
pp. 1138-1142 ◽  
Author(s):  
Lilian R. Graser ◽  
Sophie Jürgens ◽  
Michael E. Wilhelm ◽  
Mirza Cokoja ◽  
Wolfgang A. Herrmann ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Ionic Liquid ◽  
Catalyst Concentration ◽  
Sodium Molybdate ◽  
Significant Loss ◽  
Catalytic Epoxidation ◽  
Epoxidation Reaction ◽  
Epoxidation Of Olefins

Polyoxomolybdates were generated in situ by treating a carboxylic acid-functionalized ionic liquid with an aqueous solution of sodium molybdate. This reaction mixture was applied in the catalytic epoxidation of olefins using hydrogen peroxide as oxidant. The influence of acid and catalyst concentration as well as of the reaction temperature was investigated. The system showed a good performance for the epoxidation reaction and can be reused several times without a significant loss of activity. We present an easy, cheap and environmentally friendly catalytic system for the epoxidation of cis-cyclooctene.

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.

Asymmetric epoxidation of olefins by chiral dioxiranes generated in situ from ketones of d-(−)-quinic acid

1999 ◽  
Vol 10 (14) ◽  
pp. 2749-2755 ◽  
Author(s):  
Waldemar Adam ◽  
Chantu R. Saha-Möller ◽  
Cong-Gui Zhao
Keyword(s):  
Quinic Acid ◽  
Asymmetric Epoxidation ◽  
Epoxidation Of Olefins

Asymmetric Epoxidation of Olefins Catalyzed by Chiral Iminium Salts Generated in Situ from Amines and Aldehydes

2001 ◽  
Vol 3 (16) ◽  
pp. 2587-2590 ◽  
Author(s):  
Man-Kin Wong ◽  
Lai-Mei Ho ◽  
Yan-Song Zheng ◽  
Chun-Yu Ho ◽  
Dan Yang
Keyword(s):  
Asymmetric Epoxidation ◽  
Iminium Salts ◽  
Epoxidation Of Olefins
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