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The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
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Molecules that possess multiple chiral centers can afford a large number of stereoisomers. For instance, while some molecules like 2-butanol have one chiral center, defined as a tetrahedral carbon atom with four different substituents attached, several molecules like butane-2,3-diol have multiple chiral centers. A simple formula to predict the number of stereoisomers possible for a molecule with n chiral centers is 2n. However, there can be a lower number where some of the stereoisomers are...
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Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
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Chiral Triptycenes: Concepts, Progress and Prospects.

Md Nasim Khan1, Thomas Wirth1

  • 1School of Chemistry, Cardiff University, Park Place, Main Building, Cardiff, CF10 3AT, UK.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|January 12, 2021
PubMed
Summary
This summary is machine-generated.

Chiral triptycenes, unique organic molecules with propeller shapes, are crucial for developing advanced functional materials. This review explores their fundamental chirality and applications.

Keywords:
absolute configurationcatalysischiral advanced materialschiral triptycenecircular polarized luminescence

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Area of Science:

  • Organic Chemistry
  • Material Science
  • Supramolecular Chemistry

Background:

  • Triptycenes possess a unique propeller-like π-structure and saddle-like cavities.
  • They are extensively studied in polymer, supramolecular, and material science.
  • Unsymmetrical substitution on aromatic rings induces chirality in triptycenes.

Purpose of the Study:

  • To review the fundamental principles of triptycene chirality.
  • To highlight advanced concepts for developing functional chiral triptycene molecules.
  • To provide a comprehensive overview for researchers in organic and material science.

Main Methods:

  • Literature review of triptycene synthesis and characterization.
  • Analysis of structure-chirality relationships in substituted triptycenes.
  • Discussion of applications in various scientific fields.

Main Results:

  • Chirality in triptycenes arises from specific substitution patterns.
  • Triptycene scaffolds offer tunable properties for functional molecule design.
  • Diverse applications leverage the unique structural and chiral features of triptycenes.

Conclusions:

  • Chiral triptycenes are versatile building blocks for advanced materials.
  • Understanding their chirality is key to designing novel functional molecules.
  • This review consolidates knowledge on triptycene chirality for future research.