scholarly journals Preparation of Mesoporous SBA-16 Silica-Supported Biscinchona Alkaloid Ligand for the Asymmetric Dihydroxylation of Olefins

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Shaheen M. Sarkar ◽  
Md. Eaqub Ali ◽  
Md. Lutfor Rahman ◽  
Mashitah Mohd Yusoff
Keyword(s):  
Catalytic System ◽  
Catalyst System ◽  
Optically Active ◽  
Cinchona Alkaloid ◽  
Chiral Ligand ◽  
Asymmetric Dihydroxylation ◽  
Osmium Tetraoxide ◽  
Vicinal Diol ◽  
Ordered Mesoporous ◽  
Prepared Complex

Optically active cinchona alkaloid was anchored onto mesoporous SBA-16 silica and the as-prepared complex was used as a heterogeneous chiral ligand of osmium tetraoxide for the asymmetric dihydroxylation of olefins. The prepared catalytic system provided 90–93% yield of vicinal diol with 92–99% enantioselectivity. The ordered mesoporous SBA-16 silica was found to be a valuable support for the cinchona alkaloid liganded osmium catalyst system which is frequently used in chemical industries and research laboratories for olefin functionalization.

scholarly journals Asymmetric Hydroxylation of 1-Chloro-2-butene with Ascorbic Acid and Optically Active Polymer-Supported Copper(I) Ion Catalytic System.

1993 ◽  
Vol 50 (7) ◽  
pp. 587-590
Author(s):  
Yoshio MATSUBARA ◽  
Taro MORIMITSU ◽  
Shunji UEZAWA ◽  
Masakuni YOSHIHARA ◽  
Toshihisa MAESHIMA
Keyword(s):  
Ascorbic Acid ◽  
Catalytic System ◽  
Optically Active ◽  
Optically Active Polymer ◽  
Polymer Supported ◽  
Asymmetric Hydroxylation

A novel enantioselective synthesis of 6H-dibenzopyran derivatives by combined palladium/norbornene and cinchona alkaloid catalysis

2015 ◽  
Vol 13 (8) ◽  
pp. 2260-2263 ◽  
Author(s):  
Di Xu ◽  
Li Dai ◽  
Marta Catellani ◽  
Elena Motti ◽  
Nicola Della Ca’ ◽  
...  
Keyword(s):  
Catalytic System ◽  
Enantioselective Synthesis ◽  
Cinchona Alkaloid ◽  
System P ◽  
First Time

Chiral dibenzopyran derivatives were obtained by cinchona alkaloid, as organocatalyst, in combination, for the first time, with palladium/norbornene catalytic system.

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