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- Volume 26, Issue 10, 2022
Current Organic Chemistry - Volume 26, Issue 10, 2022
Volume 26, Issue 10, 2022
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Electrochemical Method: A Green Approach for the Synthesis of Organic Compounds
Background: Heterocyclic compounds have gained attention due to their growing demand against various infectious diseases, but their synthesis with hazardous chemicals, costly catalysts, and costly purification methods encourage researchers to explore alternative sources. The electrochemical method offers a powerful and versatile approach for assembling different heterocyclic structures. Moreover, it gives a highly proficient and green methodology that avoids harmful oxidants and reductants. Objective: In this review, we aim to compile the different types of reactions i.e., Curtin- Hammet, Michael addition, Wittig reaction, Henry, Diels-Alder, Friedel-crafts, Kolbe, Heck, Benzoin condensation reaction taking place in case of electrochemical synthesis in the last 3 years from 2017-2020. So, to the best of our knowledge, after 2017, there is no such report present that can explain the present scenario in the field of electrochemical synthesis. So this encouraged us to write a review on this interesting topic. Result: From this study, we concluded that the electrochemical methods provide a green and proficient methodology for radical intermediate’s age utilizing electrons as traceless reagents, which could avoid the use of harmful oxidants and reductants.
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Recent Advancements in Development of Radical Silylation Reactions
Transition metal-free radical hydrosilylation of alkynes and factionalized alkenes to vinylsilanes, organosilanes from alkenes, radical silylative cyclizations for sila heterocycles, aromatic dehydrogenative radical silylation, sila-amino acids, silyl hydroperoxides by using transition metal-free reaction conditions such as peroxides, photocatalyst, hydrogen atom transfer catalyst, radical initiators have become one of the most important and useful methodologies for the construction of C-Si bonds for their synthetic applications. In order to demonstrate the growth in this area, this review highlights the last twenty years of success in the fields of silylation of aromatics, silylative cyclizations of sila heterocycles, synthesis of vinylsilanes by hydrosilylation of alkynes, and functionalized alkenes, organosilanes from alkenes and dehydrogenative approaches for vinylsilanes involving radical mechanisms. We believe that summarizing these methods would be very useful for the chemists who are interested in the synthesis of organosilicon compounds for drug discovery or the development of silicon-based materials for industrial applications.
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Isolation, Bioactivities, and Synthesis of Lamellarin Alkaloids: A Review
Authors: Dau X. Duc and Nguyen Van QuocLamellarin alkaloid is a large class of marine alkaloids with diverse bioactivities. These heterocycles have been isolated from diverse marine organisms, mainly ascidians and sponges. They possess a fused 14-phenyl-6H-[1]benzopyrano[40,30:4,5] pyrrolo[2,1- a]isoquinoline or non-fused 3,4-diarylpyrrole-2-carboxylate ring systems. Until now, more than 50 lamellarins have been isolated from marine organisms. Various lamellarins exhibit valuable bioactivities, such as cytotoxicity, topoisomerase I inhibition, protein kinases inhibition, multidrug resistance reversal, and anti-HIV-1 activity. Due to their valuable biological activity, the synthesis of lamerallins has received great attention of chemists and a vast number of synthetic methods have been developed. This article gives overview of studies on lamellarins isolation, their bioactivities, and synthetic approaches for their total synthesis.
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New Developments in Chiral Phosphoric Acid Catalysis for Amine Synthesis
Authors: Bishnu P. Neupane and Gregory K. FriestadAsymmetric catalysis with chiral phosphoric acids (CPAs) has impacted a wide range of organic reactions, including those that generate chiral amines of interest in medicinal and natural products chemistry. Phosphodiester derivatives (RO)2PO2H offer linkages to various chiral alcohols and diols, permitting the CPA to transmit stereochemical information to reactants via ion-pairing and/or H-bonding interactions of the P=O and O–H bonds. This minireview presents selected recent developments in CPA-catalyzed asymmetric synthesis of amines, emphasizing innovations from the literature of 2017–2021, with a few earlier examples to provide additional context. The coverage includes additions to imines, asymmetric protonation, induction of axial asymmetry, asymmetric Ugi and Passerini multicomponent coupling reactions, hydroaminations, and Minisci-type additions to heteroaromatic systems.
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Volumes & issues
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Volume 28 (2024)
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Volume 27 (2023)
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Volume 26 (2022)
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Volume 25 (2021)
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Volume 24 (2020)
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Volume 23 (2019)
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Volume 22 (2018)
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Volume 21 (2017)
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Volume 20 (2016)
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Volume 19 (2015)
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Volume 18 (2014)
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Volume 17 (2013)
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Volume 16 (2012)
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Volume 15 (2011)
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Volume 14 (2010)
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Volume 13 (2009)
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Volume 12 (2008)
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Volume 11 (2007)
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Volume 10 (2006)
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Volume 9 (2005)
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Volume 8 (2004)
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Volume 7 (2003)
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Volume 6 (2002)
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Volume 5 (2001)
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Volume 4 (2000)