scholarly journals Enantioselective Separation of Chiral N1-Substituted-1H-pyrazoles: Greenness Profile Assessment and Chiral Recognition Analysis

ACS Omega ◽  
2021 ◽  
Author(s):  
Mohammed Farrag El-Behairy ◽  
Rasha M. Hassan ◽  
Inas A. Abdallah
Keyword(s):  
Chiral Recognition ◽  
Enantioselective Separation

scholarly journals Chiral covalent organic frameworks: design, synthesis and property

2020 ◽  
Author(s):  
X Han ◽  
C Yuan ◽  
B Hou ◽  
Lujia Liu ◽  
H Li ◽  
...  
Keyword(s):  
Porous Materials ◽  
Asymmetric Catalysis ◽  
Chiral Recognition ◽  
Building Blocks ◽  
Enantioselective Separation ◽  
Structural Studies ◽  
Covalent Organic Frameworks ◽  
Covalent Bonds ◽  
Design Synthesis ◽  
Potential Applications

Covalent organic frameworks (COFs) are constructed using reticular chemistry with the building blocks being connected via covalent bonds and have emerged as a new series of porous materials for multitudinous applications. Most COFs reported to date are achiral, and only a small fraction of COFs with chiral nature are reported. This review covers the recent advances in the field of chiral COFs (CCOFs), including their design principles and synthetic strategies, structural studies, and potential applications in asymmetric catalysis, enantioselective separation, and chiral recognition. Finally, we illustrate the remaining challenges and future opportunities in this field.

scholarly journals Chiral covalent organic frameworks: design, synthesis and property

2020 ◽  
Author(s):  
X Han ◽  
C Yuan ◽  
B Hou ◽  
Lujia Liu ◽  
H Li ◽  
...  
Keyword(s):  
Porous Materials ◽  
Asymmetric Catalysis ◽  
Chiral Recognition ◽  
Building Blocks ◽  
Enantioselective Separation ◽  
Structural Studies ◽  
Covalent Organic Frameworks ◽  
Covalent Bonds ◽  
Design Synthesis ◽  
Potential Applications

Covalent organic frameworks (COFs) are constructed using reticular chemistry with the building blocks being connected via covalent bonds and have emerged as a new series of porous materials for multitudinous applications. Most COFs reported to date are achiral, and only a small fraction of COFs with chiral nature are reported. This review covers the recent advances in the field of chiral COFs (CCOFs), including their design principles and synthetic strategies, structural studies, and potential applications in asymmetric catalysis, enantioselective separation, and chiral recognition. Finally, we illustrate the remaining challenges and future opportunities in this field.

Enantioselective Recognition of Chiral Guests by the Water-Soluble Chiral Keplerate {Mo132} Spherical Capsule with 30 Inner Lactate Ligands

2019 ◽  
Author(s):  
Nancy Watfa ◽  
Weimin Xuan ◽  
Zoe Sinclair ◽  
Robert Pow ◽  
Yousef Abul-Haija ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Chiral Recognition ◽  
Association Constants ◽  
Water Soluble ◽  
Enantioselective Recognition ◽  
H Nmr ◽  
Dosy Nmr ◽  
Spherical Capsule ◽  
Surface Pores ◽  
Guest Chemistry

Investigations of chiral host guest chemistry are important to explore recognition in confined environments. Here, by synthesizing water-soluble chiral porous nanocapsule based on the inorganic metal-oxo Keplerate-type cluster, {Mo<sub>132</sub>} with chiral lactate ligands with the composition [Mo<sub>132</sub>O<sub>372</sub>(H<sub>2</sub>O)<sub>72</sub>(<i>x-</i>Lactate)<sub>30</sub>]<sup>42-</sup> (<i>x</i> = D or L), it was possible to study the interaction with a chiral guest, L/D-carnitine and (<i>R</i>/<i>S</i>)-2-butanol in aqueous solution. The enantioselective recognition was studied by quantitative <sup>1</sup>H NMR and <sup>1</sup>H DOSY NMR which highlighted that the chiral recognition is regulated by two distinct sites. Differences in the association constants (K) of L- and D-carnitine, which, due to their charge, are generally restricted from entering the interior of the host, are observed, indicating that their recognition predominantly occurs at the surface pores of the structure. Conversely, a larger difference in association constants (K<i><sub>S</sub></i>/K<i><sub>R</sub></i> = 3) is observed for recognition within the capsule interior of (<i>R</i>)- and (<i>S</i>)-2-butanol.

A Self‐Assembled Cage for Wide‐Scope Chiral Recognition in Water

2021 ◽  
Author(s):  
Guangcheng Wu ◽  
Yixin Chen ◽  
Shuai Fang ◽  
Lu Tong ◽  
Libo Shen ◽  
...  
Keyword(s):  
Chiral Recognition ◽  
Wide Scope ◽  
Self Assembled

ChemInform Abstract: Molecular Chiral Recognition in Supercritical Solvents.

ChemInform ◽  
2010 ◽  
Vol 25 (18) ◽  
pp. no-no
Author(s):  
E. FOGASSY ◽  
M. ACS ◽  
T. SZILI ◽  
B. SIMANDI ◽  
J. SAWINSKY
Keyword(s):  
Chiral Recognition ◽  
Supercritical Solvents

Separation of tetrahydrozoline enantiomers in capillary electrophoresis with cyclodextrin-type chiral selectors and investigation of chiral recognition mechanisms

2021 ◽  
Vol 1643 ◽  
pp. 462084
Author(s):  
Ann Gogolashvili ◽  
Ketevan Lomsadze ◽  
Lali Chankvetadze ◽  
Nino Takaishvili ◽  
Paola Peluso ◽  
...  
Keyword(s):  
Capillary Electrophoresis ◽  
Chiral Recognition ◽  
Chiral Selectors

scholarly journals Catalytic enantioselective synthesis of macrodiolides and their application in chiral recognition

2021 ◽  
Author(s):  
Wanlong Xiao ◽  
Yuhao Mo ◽  
Jing Guo ◽  
Zhishan Su ◽  
Shunxi Dong ◽  
...  
Keyword(s):  
Chiral Recognition ◽  
Enantioselective Synthesis ◽  
Quinone Methides ◽  
New Type

A new type of C2-symmetric chiral macrodiolides are readily obtained via chiral N,Nʹ-dioxide-scandium(III) complex-promoted asymmetric tandem Friedel-Crafts alkylation/intermolecular macrolactonization of ortho-quinone methides with C3-substituted indoles. This protocol provides an array...

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