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Updated: Dec 30, 2025
Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs
Published on: January 17, 2020
Self-Supported Chiral Polymeric MnIII Salen Complexes as Highly Active and Recyclable Catalysts for Epoxidation of
Tamal Roy1, Rukhsana I Kureshy1,2, Noor-Ul H Khan1,2
1Discipline of Inorganic Materials and Catalysis, Central Salt and Marine Chemicals Research Institute (CSMCRI), Bhavnagar, Gujarat 364 021 (India), Fax: (+91) 0278-2566970.
Abstract:
A series of self-supported chiral polymeric MnIII N,N'-ethylenebis(salicylimine) (salen) complexes were synthesized through metalation of the corresponding salen ligands obtained by condensation of several bis/tris-aldehydes with (1R,2R)-1,2-diaminocyclohexane. Upon employment in the asymmetric epoxidation reaction of nonfunctionalized olefins, all complexes showed enhanced activity and enantioselectivity relative to the classical Jacobsen's monomeric salen complex. However, 1,3,5-triazole-based polymeric MnIII salen complex 7 was noticeably preferred over others owing to its ability to render higher enantioselectivity at the expense of lower catalyst loading. Furthermore, complex 7 was recycled and reused in eight recycling experiments with marginal loss in catalytic activity.
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