Ring-Opening of Unsymmetrical 1,2-Dioxines Using Cobalt(II) Salen Complexes

2005 ◽  
Vol 70 (2) ◽  
pp. 470-476 ◽  
Author(s):  
Ben W. Greatrex ◽  
Dennis K. Taylor
Keyword(s):  
Ring Opening ◽  
Salen Complexes

Chiral (Salen) Complexes Encapsulated in Mesoporous ZSM-5 as an Optical Active Catalyst for Asymmetric Phenolic Ring Opening of Terminal Epoxides

2007 ◽  
Vol 124-126 ◽  
pp. 1809-1812
Author(s):  
Kwang Yeon Lee ◽  
Young Hee Lee ◽  
Chang Kyo Shin ◽  
Geon Joong Kim
Keyword(s):  
Ring Opening ◽  
Acidic Solution ◽  
Active Catalyst ◽  
Immobilized Catalysts ◽  
Phenolic Ring ◽  
Salen Complexes ◽  
Ring Opening Of Epoxides ◽  
Very High ◽  
Chiral Salen Complexes

ZSM-5 was modified by alkaline and acidic solution to introduce mesoporosity in the crystals. Heterogenized Co(III) salen was prepared in the mesopores of ZSM-5 by ‘ship-in-a-bottle’ method. Phenolic ring opening of epoxides was performed successfully by using encapsulated chiral salen catalysts. Very high enantioselectivity and conversion were obtained in PKR reaction by immobilized catalysts.

Titanium–salen complexes as initiators for the ring opening polymerisation of rac-lactide

2006 ◽  
pp. 3134-3140 ◽  
Author(s):  
Charlotte K. A. Gregson ◽  
Ian J. Blackmore ◽  
Vernon C. Gibson ◽  
Nicholas J. Long ◽  
Edward L. Marshall ◽  
...  
Keyword(s):  
Ring Opening ◽  
Salen Complexes

scholarly journals Asymmetric Ring-Opening of Epoxides Catalyzed by Metal–Salen Complexes

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 705
Author(s):  
Anna Lidskog ◽  
Yutang Li ◽  
Kenneth Wärnmark
Keyword(s):  
Functional Groups ◽  
Organic Synthesis ◽  
Ring Opening ◽  
Kinetic Resolution ◽  
Catalytic Systems ◽  
Salen Complexes ◽  
Epoxide Opening ◽  
Ring Opening Of Epoxides ◽  
One Step ◽  
Asymmetric Ring Opening

The asymmetric ring-opening of epoxides is an important reaction in organic synthesis, since it allows for the enantioselective installation of two vicinal functional groups with specific stereochemistry within one step from a highly available starting material. An effective class of catalysts for the asymmetric ring-opening of epoxides is metal–salen complexes. This review summarizes the development of metal–salen catalyzed enantioselective desymmetrization of meso-epoxides and kinetic resolution of epoxides with various nucleophiles, including the design and application of both homogeneous- and heterogeneous epoxide-opening catalysts as well as multi-metallic covalent and supramolecular catalytic systems.

Alternating ring-opening copolymerization of cyclohexene oxide with phthalic anhydride catalyzed by iron(III) salen complexes

2015 ◽  
Vol 23 (2) ◽  
pp. 161-166 ◽  
Author(s):  
Robert Mundil ◽  
Zdeněk Hošt’álek ◽  
Ivana Šeděnková ◽  
Jan Merna
Keyword(s):  
Phthalic Anhydride ◽  
Ring Opening ◽  
Cyclohexene Oxide ◽  
Salen Complexes

Development of recyclable chiral macrocyclic metal complexes for asymmetric aminolysis of epoxides: application for the synthesis of an enantiopure oxazolidine ring

2018 ◽  
Vol 42 (18) ◽  
pp. 15325-15331 ◽  
Author(s):  
Raj Kumar Tak ◽  
Manish Kumar ◽  
Mohd Nazish ◽  
Tushar Kumar Menapara ◽  
Rukhsana I. Kureshy ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Ring Opening ◽  
Amino Alcohols ◽  
Salen Complexes ◽  
Ring Opening Reaction

Macrocyclic Cr(iii)-salen complexes were synthesized for the ring opening reaction of various epoxides with anilines to furnish the corresponding β-amino-α-hydroxyl esters and β-amino alcohols with excellent ee/yield upto 99/95%.

Cooperative activation in ring-opening hydrolysis of epoxides by Co-salen complexes: A first principle study

2009 ◽  
Vol 470 (4-6) ◽  
pp. 259-263 ◽  
Author(s):  
Keju Sun ◽  
Wei-Xue Li ◽  
Zhaochi Feng ◽  
Can Li
Keyword(s):  
Ring Opening ◽  
First Principle ◽  
Salen Complexes ◽  
Hydrolysis Of ◽  
Cooperative Activation

Theoretical Studies on the Influence of Metallic Cations on Ring Opening of Propylene Oxide Catalyzed by Metal Salen Complexes

Authorea ◽  
2020 ◽  
Author(s):  
Lei Chen ◽  
Hui Qing Yang ◽  
CHENGYU JIN ◽  
Zhao Xu Chen
Keyword(s):  
Propylene Oxide ◽  
Ring Opening ◽  
Theoretical Studies ◽  
Salen Complexes ◽  
Metallic Cations

On the activity of chiral chromium salen complexes covalently bound to solid silicates for the enantioselective epoxide ring opening

2002 ◽  
Vol 228 (1-2) ◽  
pp. 279-288 ◽  
Author(s):  
Carlos Baleizão ◽  
Bárbara Gigante ◽  
Maria Jose Sabater ◽  
Hermenegildo Garcia ◽  
Avelino Corma
Keyword(s):  
Ring Opening ◽  
Epoxide Ring ◽  
Epoxide Ring Opening ◽  
Salen Complexes ◽  
Covalently Bound
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