Current Organic Chemistry - Online First

Mangiferin always draws the attention of traditional as well as modern medicinal chemists because of its ease of chemical derivatization and diverse biological activities, including anticancer, anti-inflammatory, neuroprotective, antidiabetic, analgesic, antimalarial, anticonvulsant, laxative, cardiotonic, hemopoietic, antioxidant, antimicrobial, antipsychotic, anticoagulant, and antihypertensive properties. This review focuses on a detailed and updated overview of the synthesis of mangiferin derivatives and their diverse biological activities, with examples from both patented and non-patented literature.

N-Chlorosuccinimide (NCS) is a five-membered N-containing heterocyclic molecule. This is a versatile reagent and is successfully employed for different types of reactions. Initially, this was employed for chlorination only but soon became an excellent reagent for many reactions, including halocyclizations, functional group transformations, formation of carbon-carbon bonds, etc. This review article covers representative applications of NCS for aliphatic and aromatic chlorination, chlorination of atoms other than carbon, oxidation, and other reactions.

Indoles are critical in natural amalgamation for their flexible jobs in drugs, regular items, and material science, exhibiting huge pharmacological and compound reactivity. Due to their versatility and high reactivity, nitroalkenes are essential electrophilic partners in organic synthesis. While indoles and nitroalkenes are used in both Michael addition and Friedel-Crafts alkylation for producing carbon-carbon bonds, the catalyst types and reactions involved are different. Michael addition employs conjugate addition, whereas Friedel-Crafts alkylation employs electrophilic aromatic substitution. Each technique has a different level of selectivity and distinct synthetic applications. This review examines the advancements and persistent challenges in catalysis, focusing on the comparative methodologies of Friedel-Crafts alkylation and Michael addition involving indoles and nitroalkenes. Emphasizing green chemistry principles, it discusses the potential for sustainable and efficient synthetic processes through the use of innovative catalysts, including photocatalysis and biocatalysis. The integration of computational studies and interdisciplinary collaboration is essential for developing economically viable and environmentally responsible chemical synthesis, ultimately contributing to the creation of advanced materials and pharmaceuticals.

Molecular photoswitches represent a dynamic and ever-growing research area based on the ability of molecules to convert (switch) between cis- (Z) and trans- (E) isomers. Azobenzenes are the most popular and widely employed Z-E photoswitchable molecules in the development of photoresponsive, multifunctional smart materials for various applications. The promising avenues in this field include molecular fine-tuning of azobenzene-based photoswitches and the creation of single or dual-functional probes.

This short overview highlights recent advances in the design of molecular photoswitches, particularly the molecular design strategies of azobenzene-based photoswitches with their structural and electronic features. Particular attention is paid to azoquinolines, which seem to be a promising alternative to azobenzenes in the design of novel multifunctional photoswitches with improved photochromic properties. Here, we have also developed the novel star-shaped multiazoquinoline photoswitch comprising individual azoquinoline-based photochromes connected to a central trisubstituted 1,3,5-triformylphloroglucinol core by quantum chemical calculations. This unique structure is favorable for independent Z-E isomerization of each azoquinoline-based photochrome within one macromolecule.

Indoles are critical in natural amalgamation for their flexible jobs in drugs, regular items, and material science, exhibiting huge pharmacological and compound reactivity. Due to their versatility and high reactivity, nitroalkenes are essential electrophilic partners in organic synthesis. While indoles and nitroalkenes are used in both Michael addition and Friedel-Crafts alkylation for producing carbon-carbon bonds, the catalyst types and reactions involved are different. Michael addition employs conjugate addition, whereas Friedel-Crafts alkylation employs electrophilic aromatic substitution. Each technique has a different level of selectivity and distinct synthetic applications. This review aims to examine the advancements and persistent challenges in catalysis, focusing on the comparative methodologies of Friedel-Crafts alkylation and Michael addition involving indoles and nitroalkenes. Emphasizing green chemistry principles, it discusses the potential for sustainable and efficient synthetic processes through the use of innovative catalysts, including photocatalysis and biocatalysis. The integration of computational studies and interdisciplinary collaboration is essential for developing economically viable and environmentally responsible chemical synthesis, ultimately contributing to the creation of advanced materials and pharmaceuticals.

The Corona Virus Disease-19 (COVID-19) pandemic challenged the scientific community in the search for developing effective treatments, such as medicine and/or a vaccine candidate. The SARS-CoV-2 virus and its variants, Omega, Omicron, and Delta, remain as a major threat to human health, causing significant morbidity and mortality worldwide. Given that computational methods are thought to be quick, easy, and inexpensive, they have been widely used in this scenario to design new anti-COVID-19 drug candidates. In addition, heterocyclic scaffolds have been explored exhaustively for their biological properties and as fruitful sources of new molecular entities to fulfill the chemical space available.In light of this, we intend to highlight the synthetic techniques used to produce novel heterocyclic derivatives that may serve as effective anti-COVID-19 lead candidates by focusing on important viral proteins and using computational tools. Then, the objective of this article, with a theoretical nature, is to contribute to the delimitation of organic chemistry methods to achieve new anti-COVID-19 agents.