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Special Issue "Organic Reactions in Deep Eutectic Solvents"

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Organic Chemistry".

Deadline for manuscript submissions: 29 February 2024 | Viewed by 1819

Special Issue Editors

Organic Chemistry Department and Organic Synthesis Institute, Alicante University, P.O. Box 99, 03080 Alicante, Spain
Interests: organic synthesis; green chemistry; deep eutectic solvents; transition-metal catalysis; organocatalysis; enantioselective synthesis; polymer synthesis
Dipartimento di Farmacia e Scienze della Salute e della Nutrizione, Università della Calabria, Arcavacata di Rende, Italy
Interests: mass spectrometry; bioconjugates; amino acids; peptide synthesis; organic synthesis; green chemistry; deep eutectic solvents
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Special Issue Information

Dear Colleagues,

The need for a more sustainable synthesis of organic compounds is undeniable. The replacement of volatile organic compounds (VOCs) as solvent media in organic transformations is crucial to access valuable organic products in an environmentally benign manner.

Among the neoteric solvents available for this purpose, Deep Eutectic Solvents (DES) have gained increased attention in recent years. Although eutectic mixtures have been known for centuries, it was not until 2003, when Andrew Abbott coined the term DES, that the use of these solvents started to be explored in several research fields. DESs, defined as mixtures of pure compounds for which the eutectic point temperature is below that of an ideal liquid mixture, meet the requirements to be considered as green solvents. Apart from the fact that they have a negligible boiling point, easy preparation, low cost, low toxicity, or high biodegradability, DESs also provide the possibility of tailoring their physicochemical properties to the chemical process, making this a relevant feature for organic synthesis. In addition, most DESs are obtained through a simple extraction with water, allowing the easy separation of the organic products from the DES. However, if catalysts are needed for the transformation, the catalyst/DES system can be designed to recover the catalysts after the reaction has taken place. Furthermore, some unique properties such as gas solubility and the stability of radical intermediates have provided the opportunity to discover novel reactivities.

In this Special Issue, we intend to compile the latest achievements in the use of DESs in organic transformations as the solvent media. Especially in catalyzed reactions, whether a DES is used as a solvent or as the catalyst, the focus will be on its possible recycling and reuse. The goal of this Special Issue will be to advance the state-of-the-art in this field and further explore the new prospects offered by DESs in organic synthesis.

Prof. Dr. Gabriela Guillena
Dr. Maria Luisa Di Gioia
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • organic synthesis
  • green chemistry
  • biocatalysis
  • organocatalysis
  • transition-metal catalysis
  • recyclability

Published Papers (2 papers)

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Research

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13 pages, 1776 KiB  
Article
Nickel-Imidazolium Low Transition Temperature Mixtures with Lewis-Acidic Character
Molecules 2023, 28(17), 6338; https://doi.org/10.3390/molecules28176338 - 30 Aug 2023
Viewed by 312
Abstract
Low transition temperature mixtures (LTTMs) are a new generation of solvents that have found extensive application in organic synthesis. The interactions between the components often generate highly activated, catalytically active species, thus opening the possibility of using LTTMs as catalysts, rather than solvents. [...] Read more.
Low transition temperature mixtures (LTTMs) are a new generation of solvents that have found extensive application in organic synthesis. The interactions between the components often generate highly activated, catalytically active species, thus opening the possibility of using LTTMs as catalysts, rather than solvents. In this work, we introduce a nickel-based imidazolium LTTM, study its thermal behavior and explore its catalytic activity in the solvent-free allylation of heterocycles with allylic alcohols. This system is effective in this reaction, affording the corresponding products in excellent yield without the need for additional purifications, thus resulting in a very environmentally friendly protocol. Full article
(This article belongs to the Special Issue Organic Reactions in Deep Eutectic Solvents)
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Review

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27 pages, 6640 KiB  
Review
N-, O- and S-Heterocycles Synthesis in Deep Eutectic Solvents
Molecules 2023, 28(8), 3459; https://doi.org/10.3390/molecules28083459 - 14 Apr 2023
Cited by 4 | Viewed by 1265
Abstract
The synthesis of heterocycles is a fundamental area of organic chemistry that offers enormous potential for the discovery of new products with important applications in our daily life such as pharmaceuticals, agrochemicals, flavors, dyes, and, more generally, engineered materials with innovative properties. As [...] Read more.
The synthesis of heterocycles is a fundamental area of organic chemistry that offers enormous potential for the discovery of new products with important applications in our daily life such as pharmaceuticals, agrochemicals, flavors, dyes, and, more generally, engineered materials with innovative properties. As heterocyclic compounds find application across multiple industries and are prepared in very large quantities, the development of sustainable approaches for their synthesis has become a crucial objective for contemporary green chemistry committed to reducing the environmental impact of chemical processes. In this context, the present review focuses on the recent methodologies aimed at preparing N-, O- and S-heterocyclic compounds in Deep Eutectic Solvents, a new class of ionic solvents that are non-volatile, non-toxic, easy to prepare, easy to recycle, and can be obtained from renewable sources. Emphasis has been placed on those processes that prioritize the recycling of catalyst and solvent, as they offer the dual benefit of promoting synthetic efficiency while demonstrating environmental responsibility. Full article
(This article belongs to the Special Issue Organic Reactions in Deep Eutectic Solvents)
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