Recyclable Organocatalysts in Asymmetric Synthesis

Date

2021-05-01

Author

Susam, Zeynep Dilşad
Tanyeli, Cihangir

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

226
views

0
downloads

Chiral organocatalysts are extensively in demand over the past 30 years for the synthesis of asymmetric compounds with remarkable stereoselectivities in high yields. In addition to these great facilities, they are eco-friendly, non-toxic, highly stable, and inexpensive structures so that a tremendous amount of studies has been developing. Besides, recyclable organocatalyst studies are of great interest to develop their environmental-friendly feature lately. Increasing the usage of these catalysts by saving the asymmetric results could become the most desirable characteristic in near future. This survey summarizes the following studies that have been done so far to enlight this subject and our headlights cover-up silica supported organocatalysts, polymer supported organocatalysts, magnetic nanoparticle supported organocatalysts, gold nanoparticle supported organocatalysts, ionic liquids organocatalysts and fluorous supported organocatalysts.

URI

https://hdl.handle.net/11511/90701

Journal

ASIAN JOURNAL OF ORGANIC CHEMISTRY

DOI

https://doi.org/10.1002/ajoc.202100165

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

Asymmetric synthesis of chiral camphor fused pyridine type novel organocatalysts Küçükdişli, Murat; Tanyeli, Cihangir; Department of Chemistry (2009) Chiral pyridines as organocatalysts have been used in asymmetric organic synthesis in recent years. The asymmetric synthesis of camphor fused pyridine type novel organocatalysts were perfomed starting from cheap and easily available natural (+)-camphor. Using camphor fused pyridine skeleton, six organocatalysts 29, 32, 33, 38, 40, and 41were successfully synthesized. The first four nucleophilic and Lewis base catalysts 29, 32, and 33 are different P-oxides and P,N-dioxides which were tested in allylation of...
Bicyclic strained allenes : incorporation of an allene unit into alpha-pinene and benzonorbornadiene Kılbaş, Benan; Balcı, Metin; Department of Chemistry (2009) The synthesis of cyclic allenes with eight or less skeletal C-atoms, known as highly strained organic compounds, has for the past decades attracted increasing interest. The first part of study describes an investigation aimed at the incorporation of an allene unit into a natural compound, being α-pinene, by using β-elimination method. The two double-bond isomers 310 and 299b were synthesized as key compounds. Treatment of 310 with t-BuOK resulted in the formation of ketone 308 and diene 313. For the formati...
Bifunctional Silicotungstic Acid and Tungstophosphoric Acid Impregnated Cu-Zn-Al & Cu-Zn-Zr Catalysts for Dimethyl Ether Synthesis from Syngas Karaman, Birce Pekmezci; OKTAR, NURAY; DOĞU, GÜLŞEN; Doğu, Timur (2020-09-01) In the present study, a set of methanol synthesis catalysts with different Cu/Zn/Al or Cu/Zn/Zr molar ratios were synthesized by a co-precipitation method. Silicotungstic acid and tungstophosphoric acid were impregnated into these materials to synthesize new bifunctional catalytic materials to be used in direct synthesis of dimethyl ether (DME) from syngas. In the case of methanol production, synthesized Cu/Zn/Al catalysts exhibited quite high methanol selectivity, reaching to approximately 87%. These resul...
Coordination polymerization of cyclic ethers by metal xanthates and carbamates Taş, Hüseyin; Alyürük, Kemal; Department of Polymer Science and Technology (2003) Zinc xanthates are active catalysts in stereoregular polymerization of propylene oxide and markedly more stable than that of known classical stereoregular catalysts. But steric control of zinc xanthates is weaker. To find more effective catalyst systems the isopropyl xanthates of Cu, Pb, Ni, Fe, Al and Sn are investigated and only copper (Cu(isoPr)Xt) and tin (Sn(isoPr)Xt) isopropyl xanthates were appeared to be active, but Cu(isoPr)Xt yielded only low molecular weight product. Therefore Sn(isoPr)Xt system ...
Multicomponent ion exchange on synthetic zeolites Beşel Düzgün, Elif; Yücel, Hayrettin; Department of Chemical Engineering (2014) Zeolites are natural and synthetic microporous crystalline aluminosilicates with ion-exchange and molecular sieve properties. Zeolites consist of a three-dimensional framework of (SiO4)4- and (AlO4)5- tetrahedras, connected by a shared oxygen atom. The presence of aluminum in the aluminosilicate framework introduces a net negative charge. Zeolites are mostly used in ion exchange, adsorption processes and catalytic applications. The objective of the study was to determine and model the multicomponent ion exc...

Citation Formats

Z. D. Susam and C. Tanyeli, “Recyclable Organocatalysts in Asymmetric Synthesis,” ASIAN JOURNAL OF ORGANIC CHEMISTRY, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/90701.