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Journal articles on the topic 'Oxidative synthesis'

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Published: 10 September 2021

Last updated: 29 July 2025

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1

S., CHANDRASEKARAN. "Substituent Directed Oxidative Cyclisation. Application to the Synthesis of Natural Products." Journal Of India Chemical Society Vol.66, April 1989 (1989): 219–25. https://doi.org/10.5281/zenodo.5939981.

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2

Capperucci, Antonella, and Damiano Tanini. "Synthesis of Nitroarenes by Oxidation of Aryl Amines." Chemistry 4, no. 1 (2022): 77–97. http://dx.doi.org/10.3390/chemistry4010007.

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Nitro compounds are an important class of organic molecules with broad application in organic synthesis, medicinal chemistry, and materials science. Among the variety of methodologies available for their synthesis, the direct oxidation of primary amines represents an attractive alternative route. Efforts towards the development of oxidative procedures for the synthesis of nitro derivatives have spanned over the past decades, leading to a wide variety of protocols for the selective oxidative conversion of amines to nitro derivatives. Methods for the synthesis of nitroarenes via oxidation of ary

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3

Guo, Bin, Devasier Bennet, Daniel J. Belcher, Hyo-Gun Kim, and Gustavo A. Nader. "Chemotherapy agents reduce protein synthesis and ribosomal capacity in myotubes independent of oxidative stress." American Journal of Physiology-Cell Physiology 321, no. 6 (2021): C1000—C1009. http://dx.doi.org/10.1152/ajpcell.00116.2021.

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Chemotherapeutic agents (CAs) are first-line antineoplastic treatments against a wide variety of cancers. Despite their effectiveness in halting tumor progression, side effects associated with CAs promote muscle loss by incompletely understood mechanisms. To address this problem, we first identified how oxidative stress impairs protein synthesis in C2C12 myotubes. Transient elevations in reactive oxygen species (ROS) resulted in protein synthesis deficits and reduced ribosomal (r)RNA levels. Oxidative stress did not reduce rRNA gene (rDNA) transcription, but it caused an increase in rRNA and p

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4

Qin, Bei, Kuan Yang, and Ruijun Cao. "Synthesis and Antioxidative Activity of Piperine Derivatives Containing Phenolic Hydroxyl." Journal of Chemistry 2020 (July 21, 2020): 1–9. http://dx.doi.org/10.1155/2020/2786359.

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Piperine was used in this study in its raw form, and different steps, such as amide hydrolysis and amidation, were used to synthesize piperine derivatives containing a phenolic hydroxyl group. DPPH and ABTS free radical scavenging assays were used to assess piperine derivative antioxidant activities. We constructed an AAPH oxidative stress erythrocyte model to study the effect of piperine derivatives on the hemolysis rate of oxidatively damaged erythrocytes as well as the hemoglobin oxidation rate. This AAPH model was also used to determine piperine derivative effects on antioxidant enzyme act

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5

Kiss, Loránd, Melinda Nonn, Lamiaa Ouchakour, and Attila M. Remete. "Application of Oxidative Ring Opening/Ring Closing by Reductive Amination Protocol for the Stereocontrolled Synthesis of Functionalized Azaheterocycles." Synlett 33, no. 04 (2021): 307–28. http://dx.doi.org/10.1055/s-0040-1719850.

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AbstractThe current Account gives an insight into the synthesis of some N-heterocyclic β-amino acid derivatives and various functionalized saturated azaheterocycles accessed from substituted cycloalkenes via ring C=C bond oxidative cleavage followed by ring closing across double reductive amination. The ring-cleavage protocol has been accomplished according to two common approaches: a) Os-catalyzed dihydroxylation/NaIO4 vicinal diol oxidation and b) ozonolysis. A comparative study on these methodologies has been investigated. Due to the everincreasing relevance of organofluorine chemistry in d

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6

Lepine, Allan J., Malcolm Watford, R. Dean BOYD, Deborah A. Ross, and Dana M. Whitehead. "Relationship between hepatic fatty acid oxidation and gluconeogenesis in the fasting neonatal pig." British Journal of Nutrition 70, no. 1 (1993): 81–91. http://dx.doi.org/10.1079/bjn19930106.

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Hepatocytes were isolated from sixteen fasting neonatal pigs and used in two experiments: (1) to determine the effect of various factors on the ability for hepatic oxidation of fatty acids and (2) to clarify the relationship between fatty acid oxidation and glucose synthesis. In Expt 1, newborn pigs were either fasted from birth for 24 h or allowed to suck ad lib. for 3 d followed by a 24 h fast. In the presence of pyruvate, oxidation of octanoate (2 mM) was about 30-fold greater than oleate (1 mM) regardless of age, but glucose synthesis was not enhanced beyond that observed for pyruvate alon

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7

Canesi, Sylvain. "Rapid Formation of Advanced Scaffolds from Phenols and Anilines." Synlett 30, no. 06 (2018): 647–64. http://dx.doi.org/10.1055/s-0037-1610340.

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This article is an account of our efforts over the last decade to functionalize phenols and anilines at any position and to use these compounds to generate substituted aromatic systems and advanced unsaturated cyclohexanone moieties, enabling the rapid formation of complex structures. Total syntheses of numerous natural products involving such intermediates were achieved.1 Introduction2 ortho-Functionalization of Phenols and Aniline Derivatives Mediated by Iodanes (III) and Synthesis of Panacene2.1 Cross-Coupling with Aniline Derivatives2.2 Dearomative Cycloaddition of Arenes and Heteroarenes2

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8

Faisal, Muhammad, Mukhtiar Ahmed, Sarwat Hussain, Fayaz Ali Larik, and Aamer Saeed. "Investigating the effectiveness of classical and eco-friendly approaches for synthesis of dialdehydes from organic dihalides." Green Processing and Synthesis 8, no. 1 (2019): 635–48. http://dx.doi.org/10.1515/gps-2019-0034.

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Abstract Monoaldehydes and dialdehydes are parts of millions of compounds and are extremely versatile intermediates. For the synthesis of monoaldehydes, one impressive approach to date, because of its excellent selectivity, high yield and stability towards over-oxidation and over-reduction, is the oxidation of organic monohalides. Numerous monohalides oxidation based methodologies to afford monoaldehydes are disclosed in literature. In this research work, twelve well-known approaches (well-documented for synthesis of monoaldehydes from monohalides) are investigated for their effectiveness towa

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9

Savina, Luisa, and Aleksandr Sokolov. "Synthesis of condensed morpholine-containing systems by reductive or oxidative heterocyclisation." From Chemistry Towards Technology Step-By-Step 4, no. 3 (2023): 69–75. http://dx.doi.org/10.52957/2782-1900-2024-4-3-69-75.

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The article examines the reduction of N (2,4 dinitrophenyl)morpholine in acidic medium by tin (II) chloride. Under these conditions there is a formation of a mixture of products of reduction, chlorination and heterocyclisation reactions. The authors developed a method for the preparation of condensed 3,4 dihydro-1H-benzo[4,5]imidazo[2,1-c][1,4]oxazines by reduction of (2-nitro-4-R-phenyl)morpholine into 5-R-2-piperidin-1-ylanilines followed by oxidative heterocyclisation with supramuravic acid.

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10

Baklagin, Vladimir, Vyacheslav Baklagin, and Igor Abramov. "Synthesis of substituted 2,2'- and 4,4'-biphenyldiols using oxidative coupling reaction." From Chemistry Towards Technology Step-By-Step 4, no. 4 (2023): 131–37. http://dx.doi.org/10.52957/2782-1900-2024-4-4-131-137.

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Based on the oxidative coupling reaction, methods for the synthesis of substituted 2,2'- and 4,4'-biphenyldiols have been developed. These biphenyldiols were not described in the literature. The article presents the potential applications and limitations of the method using potassium ferricyanide and iron (III) chloride hexahydrate.

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11

Caprioglio, Diego, Daiana Mattoteia, Orazio Taglialatela-Scafati, Eduardo Muñoz, and Giovanni Appendino. "Cannabinoquinones: Synthesis and Biological Profile." Biomolecules 11, no. 7 (2021): 991. http://dx.doi.org/10.3390/biom11070991.

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Neutral cannabinoids are oxidatively unstable and are converted into quinone derivatives by atmospheric- and/or chemical oxidative dearomatization. The study of cannabinoquinones has long been plagued by their lability toward additional oxidative degradation, but full substitution of the quinone ring, as well as the introduction of steric hindrance on the alkyl substituent, have provided sufficient stability for a systematic investigation of their bioactivity and for further clinical development. These studies culminated in the discovery of the aminocannabinoquinone VCE-004.8 (5), a compound u

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12

Shaw, Kundan, Sulekha Sharma, Arindam Khatua, Amit Paul, and Alakesh Bisai. "Oxidative electro-organic synthesis of dimeric hexahydropyrrolo-[2,3-b]indole alkaloids involving PCET: total synthesis of (±)-folicanthine." Organic & Biomolecular Chemistry 19, no. 43 (2021): 9390–95. http://dx.doi.org/10.1039/d1ob01463c.

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An efficient electrochemical oxidation strategy for the total synthesis of (±)-folicanthine (1b), has been envisioned. Control experiments suggest that a PCET pathway involving stepwise ET-PT was involved in the key oxidative dimerization process.

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13

Davison, Emma K., and Jonathan Sperry. "Synthesis of the 1,2,4-thiadiazole alkaloids polycarpathiamines A and B." Organic Chemistry Frontiers 3, no. 1 (2016): 38–42. http://dx.doi.org/10.1039/c5qo00367a.

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Synthesis of the 1,2,4-thiadiazole alkaloids polycarpathiamines A and B is described. The heteroaromatic core of the natural products was assembled using a one-pot benzylic oxidation–oxidative heterocyclization process.

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14

Biswas, Titas Biswas, and Swapan Kumar Biswas. "Utility of iodine catalyzed tandem oxidation, cross-coupling and cyclisation reactions in organic synthesis." International Journal of Experimental Research and Review 27 (April 30, 2022): 39–44. http://dx.doi.org/10.52756/ijerr.2022.v27.004.

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Molecular iodine is an eco-friendly, powerful catalyst and plays an important role in pharmaceutical, medicinal and organic chemistry. For a long time, molecular iodine has been hugely applied in carbohydrate chemistry. Due to the huge application of molecular iodine in oxidation, cross coupling and cyclisation reactions, it has emerged as an elegant tool in organic synthesis. Earlier I discussed (Biswas, 2021) on iodine mediated cascade oxidative functionalisation, cyclisation and annulation reactions. In this review, I describe the utility of iodine catalysed tandem oxidation, cross coupling

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15

Burden, JK, RC Cambie, PA Craw, PS Rutledge, and PD Woodgate. "Oxidative Coupling of Lignans. IV. Monophenolic Oxidative Coupling." Australian Journal of Chemistry 41, no. 6 (1988): 919. http://dx.doi.org/10.1071/ch9880919.

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Oxidative coupling of the monophenolic monoester (6) gives an aryltetralin (12) which is a potential intermediate for the synthesis of clinically active monophenolic lignan lactones. In contrast, oxidative couplings of the monophenols (32) and (35), derived from matairesinol (29), give mixtures of diastereoisomeric cyclooctadiene lignans while 4′-demethyldeoxypodorhizon (26) does not cyclize . These results show that the degree of aromatic substitution in monophenolic diarylbutanes plays an important role in determining the outcome of oxidative coupling. An alternative synthesis of the lactone

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16

Kumar, Rajesh, Nitya Sharma, and Om Prakash. "Hypervalent Iodine Reagents in the Synthesis of Flavonoids and Related Compounds." Current Organic Chemistry 24, no. 18 (2020): 2031–47. http://dx.doi.org/10.2174/1385272824999200420074551.

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Hypervalent iodine compounds have proved to be very useful reagents to bring about various oxidative transformations including (i) α-functionalization of carbonyl compounds, (ii) oxidation of phenols, and (iii) oxidative rearrangement of ketones and α,β- unsaturated ketones. These reactions find interesting applications in the development of newer and convenient approaches for the synthesis of flavonoids. This review focuses on the use of most common three hypervalent compounds, namely iodobenzene diacetate, [hydroxy(tosyloxy)iodo]benzene, and [bis-trifluoroacetoxy(iodo)]benzene in the synthes

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17

Dobrzyn, Agnieszka, Pawel Dobrzyn, Seong-Ho Lee та ін. "Stearoyl-CoA desaturase-1 deficiency reduces ceramide synthesis by downregulating serine palmitoyltransferase and increasing β-oxidation in skeletal muscle". American Journal of Physiology-Endocrinology and Metabolism 288, № 3 (2005): E599—E607. http://dx.doi.org/10.1152/ajpendo.00439.2004.

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Stearoyl-CoA desaturase (SCD) has recently been shown to be a critical control point of lipid partitioning and body weight regulation. Lack of SCD1 function significantly increases insulin sensitivity in skeletal muscles and corrects the hypometabolic phenotype of leptin-deficient ob/ ob mice, indicating the direct antilipotoxic action of SCD1 deficiency. The mechanism underlying the metabolic effects of SCD1 mutation is currently unknown. Here we show that SCD1 deficiency reduced the total ceramide content in oxidative skeletal muscles (soleus and red gastrocnemius) by ∼40%. The mRNA levels a

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18

Fery, F., L. Plat, and E. O. Balasse. "Effect of fasting on the intracellular metabolic partition of intravenously infused glucose in humans." American Journal of Physiology-Endocrinology and Metabolism 277, no. 5 (1999): E815—E823. http://dx.doi.org/10.1152/ajpendo.1999.277.5.e815.

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The effects of fasting on the pathways of insulin-stimulated glucose disposal were explored in three groups of seven normal subjects. Group 1 was submitted to a euglycemic hyperinsulinemic clamp (∼100 μU/ml) after both a 12-h and a 4-day fast. The combined use of [3-3H]- and [U-14C]glucose allowed us to demonstrate that fasting inhibits, by ∼50%, glucose disposal, glycolysis, glucose oxidation, and glycogen synthesis via the direct pathway. In group 2, in which the clamp glucose disposal during fasting was restored by hyperglycemia (155 ± 15 mg/dl), fasting stimulated glycogen synthesis (+29 ±

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19

Cameron, DW, IT Crosby, and GI Feutrill. "Synthesis of Ventilagone." Australian Journal of Chemistry 45, no. 12 (1992): 2025. http://dx.doi.org/10.1071/ch9922025.

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Synthesis of ventilagone (4) from the naphthol (5) was complicated by oxidation involving the central ring and by extensive epimerization to the trans series in the course of Lewis-acid-mediated demethylation . These complications were avoided by prior protection as the acetate (23). Oxidative demethylation and subsequent hydrolysis converted the latter into the dihydroxy quinone (6), which was also accessible from the nitro compound (26). Spectroscopic procedures for determining relative stereochemistry of such systems are discussed. Compound (6) underwent radical C-methylation to give ventil

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20

Das, Uttam, Poulami Pattanayak, Manas Kumar Santra, and Surajit Chattopadhyay. "Synthesis of New Oxido-Vanadium Complexes: Catalytic Properties and Cytotoxicity." Journal of Chemical Research 42, no. 1 (2018): 57–62. http://dx.doi.org/10.3184/174751918x15168821806597.

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Reaction of 2,3-dihydroxy benzaldehyde with 2-({2-amino phenyl}diazenyl)phenol afforded the ligand 3-(2-(2-hydroxyphenyl)diazenyl)-4-alkylphenyliminomethyl)benzene-1,2-diol. Reaction of H2L with VOSO4. 5H2O gave the oxido-vanadium(IV) complexes [(L)VO], which exhibited a quasi-reversible oxidative cyclic voltammetric response in a V(IV)/V(V) oxidative process. The complexes act as catalysts in the oxidation of organic thioethers and bromination of phenol. Their cytotoxic properties were examined for three cancer cell lines.

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21

Sharma, Sukanya, Chandan Sharma, Manpreet Kaur, and Satya Paul. "The in situ fabrication of ZIF-67 on titania-coated magnetic nanoparticles: a new platform for the immobilization of Pd(ii) with enhanced catalytic activity for organic transformations." New Journal of Chemistry 45, no. 43 (2021): 20309–22. http://dx.doi.org/10.1039/d1nj03738b.

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The synthesis of a magnetic zeolitic-imidazolate-framework-67-supported Pd catalyst was demonstrated, and its catalytic activity for oxidation, reduction, and the oxidative deprotection of oximes was studied.

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22

Khodabakhshi, Saeed, Bahador Karami, Khalil Eskandari, S. Jafar Hoseini, and Alimorad Rashidi. "Graphene oxide nanosheets promoted regioselective and green synthesis of new dicoumarols." RSC Adv. 4, no. 34 (2014): 17891–95. http://dx.doi.org/10.1039/c4ra00508b.

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Graphene oxide (GO) was obtained by modified Hummers oxidation of graphite and used as a highly efficient, metal-free, non-oxidative, and recyclable catalyst to promote the condensation of 4-hydroxycoumarin and aryl glyoxals for synthesis of new dicoumarols.

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23

Carroll, AR, AS Krauss, and WC Taylor. "Intramolecular Oxidative Coupling of Aromatic Compounds. V. para-para Diphenolic Oxidative Coupling as a Possible Route to the Eupodienone Skeleton." Australian Journal of Chemistry 46, no. 3 (1993): 277. http://dx.doi.org/10.1071/ch9930277.

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The synthesis of (2RS,3RS)-1,4-bis(4-hydroxy-3,5-dimethoxyphenyl)-2,3-dimethylbutan-1-one (9) is described. Diphenolic oxidative coupling of (9) gave the unstable dienone (24), which decomposed in methanol to give what is believed to be the acetal (26). Synthesis of the related diarylbutane (10) was also achieved, but diphenolic coupling gave no useful result. The claimed formation of the bis ( spiro dienone ) (7) on oxidation of 4,4′-(butane-1,4-diyl) bisphenol could not be confirmed.

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24

Sathish, Manda, Fabiane M. Nachtigall та Leonardo S. Santos. "Bifunctional thiosquaramide catalyzed asymmetric reduction of dihydro-β-carbolines and enantioselective synthesis of (−)-coerulescine and (−)-horsfiline by oxidative rearrangement". RSC Advances 10, № 63 (2020): 38672–77. http://dx.doi.org/10.1039/d0ra07705d.

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A simple and efficient asymmetric synthesis of THBCs through a chiral thiosquaramide 11b catalyzed imine reduction of dihydro-β-carbolines (17a−f) and syntheses of (−)-coerulescine and (–)-horsfiline via enantioselective oxidative rearrangement.

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25

M.S., Y. KHAN, I. Z. KHAN CH., and U. KHAN S. "Synthesis of Biftavonoids. Part-II. Oxidative Coupling of Phenolic Ketones with FeCI8-DMF : Proof for Inter-flavonyl Linkage." Journal of Indian Chemical Society Vol. 62, Apr 1985 (1985): 335–37. https://doi.org/10.5281/zenodo.6322866.

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Department of Medicinal Chemistry, Institute of History of Medicine &: Medical Research, Hamdard Nagar, New Delhi-110-062 Manuscript received 30 January 1984, revised 26 December 1984, accepted 30 April 1985 Synthesis of Biftavonoids. Part-II. Oxidative Coupling of Phenolic Ketones with FeCI8-DMF : Proof for Inter-flavonyl Linkage.

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26

Deng, Shoulong, Kun Yu, Baolu Zhang, et al. "Toll-Like Receptor 4 Promotes NO Synthesis by Upregulating GCHI Expression under Oxidative Stress Conditions in Sheep Monocytes/Macrophages." Oxidative Medicine and Cellular Longevity 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/359315.

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Many groups of Gram-negative bacteria cause diseases that are harmful to sheep. Toll-like receptor 4 (TLR4), which is critical for detecting Gram-negative bacteria by the innate immune system, is activated by lipopolysaccharide (LPS) to initiate inflammatory responses and oxidative stress. Oxidation intermediates are essential activators of oxidative stress, as low levels of free radicals form a stressful oxidative environment that can clear invading pathogens. NO is an oxidation intermediate and its generation is regulated by nitric oxide synthase (iNOS). Guanosine triphosphate cyclohydrolase

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27

Suboch, G. A., and E. Yu Belyaev. "Oxidative synthesis ofpara-nitrophenol derivatives." Pharmaceutical Chemistry Journal 34, no. 4 (2000): 215–16. http://dx.doi.org/10.1007/bf02524600.

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28

Senior, A. E. "ATP synthesis by oxidative phosphorylation." Physiological Reviews 68, no. 1 (1988): 177–231. http://dx.doi.org/10.1152/physrev.1988.68.1.177.

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29

Forman, Henry Jay, and Dale A. Dickinson. "Oxidative signaling and glutathione synthesis." BioFactors 17, no. 1-4 (2003): 1–12. http://dx.doi.org/10.1002/biof.5520170101.

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30

HANS-JOACHIM, KNOLKER, and BAUERMEISTER MICHAEL. "Transition Metal Diene Complexes in Organic Synthesis. Part-17 1. Studies directed towards the Iron-mediated Synthesis of 2-Oxygenated Carbazole Alkaloids." Journal of Indian Chemical Society Vol. 71, June-Aug 1994 (1994): 345–53. https://doi.org/10.5281/zenodo.5895373.

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<em>Institut fur Organische Chemie, Universitat Karlsruhe, Richard-Willstatter-Allee. 76131 Karlsruhe, Germany Manuscript received 6 October 1993</em> We describe some studies directed towards the synthesis of 2-oxygenated carbazole alkaloids by iron-mediated oxidative coupling of 1,3-cyclohexadiene and the corresponding 3-oxygenated aryiamine derivative. The process involves a consecutive formation of a carbon-carbon bond via electrophilic aromatic substitution with an iron-complexed cyclohexadienylium cation and subsequent carbon-nitrogen bond formation via oxidative cyclisation. Using this

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31

Feron, Gilles, Geneviève Mauvais, Jeanine Lherminier та ін. "Metabolism of fatty acid in yeast: addition of reducing agents to the reaction medium influences β-oxidation activities, γ-decalactone production, and cell ultrastructure inSporidiobolus ruineniicultivated on ricinoleic acid methyl ester". Canadian Journal of Microbiology 53, № 6 (2007): 738–49. http://dx.doi.org/10.1139/w07-028.

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The sensitivity of Sporidiobolus ruinenii yeast to the use of reducing agents, reflected in changes in the oxidoreduction potential at pH 7 (Eh7) environment, ricinoleic acid methyl ester catabolism, γ-decalactone synthesis, cofactor level, β-oxidation activity, and ultrastructure of the cell, was studied. Three environmental conditions (corresponding to oxidative, neutral, and reducing conditions) were fixed with the use of air or air and reducing agents (hydrogen and dithiothreitol). Lowering Eh7to neutral conditions (Eh7 = +30 mV and +2.5 mV) favoured the production of lactone more than the

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32

Kiffin, Roberta, Christopher Christian, Erwin Knecht, and Ana Maria Cuervo. "Activation of Chaperone-mediated Autophagy during Oxidative Stress." Molecular Biology of the Cell 15, no. 11 (2004): 4829–40. http://dx.doi.org/10.1091/mbc.e04-06-0477.

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Oxidatively damaged proteins accumulate with age in almost all cell types and tissues. The activity of chaperone-mediated autophagy (CMA), a selective pathway for the degradation of cytosolic proteins in lysosomes, decreases with age. We have analyzed the possible participation of CMA in the removal of oxidized proteins in rat liver and cultured mouse fibroblasts. Added to the fact that CMA substrates, when oxidized, are more efficiently internalized into lysosomes, we have found a constitutive activation of CMA during oxidative stress. Oxidation-induced activation of CMA correlates with highe

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33

Zhyznevskiy, Vyacheslav, and Volodymyr Gumenetskiy. "Metacrylonitrile Obtaining by isobutylene, tert- and isobutyl alcohols oxidative amonolysis." Chemistry & Chemical Technology 3, no. 1 (2009): 19–28. http://dx.doi.org/10.23939/chcht03.01.019.

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Metacrylonitrile obtained by oxidative amonolysis over different oxidative catalysts has been investigated. Instead of isobutylene an alternative raw material has been investigated for the metacrylonitrile synthesis.

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34

Mahato, Nihar Ranjan, Kamala Mandy Hansda, Ajit Das, Jayanta Banerjee, Sridhar Mondal, and Nagendranath Mahata. "Synthesis of Mesoporous Carbon Xerogel and Activation by Oxidative Treatment." Asian Journal of Chemistry 31, no. 10 (2019): 2139–42. http://dx.doi.org/10.14233/ajchem.2019.22009.

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Synthesis of carbon xerogel and modification of its surface by various oxidative treatments are explored. Organic gel was synthesized by following the conventional sol-gel approach using formaldehyde and resorcinol. The wet gel was dried under subcritical condition and then carbonized, leading to carbon xerogel. Subsequently, the carbon xerogel was subjected to surface activation by means of oxidative treatment with nitric acid, sulphuric acid as well as aerial oxidation. Surface acid/base properties of the carbon xerogel have been strongly altered by treatments with nitric acid as well as wit

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35

Biçer, Emre, and Mehmet Yılmaz. "Recent Advances in Manganese(III)-Assisted Radical Cyclization for the Synthesis of Natural Products: A Comprehensive Review." Molecules 29, no. 10 (2024): 2264. http://dx.doi.org/10.3390/molecules29102264.

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Natural products play an important part in synthetic chemistry since they have many pharmacological properties and are used as active drug compounds in pharmaceutical chemistry. However, synthesis of these complex molecules is difficult due to the requirement of various synthetic steps, which include highly regio- and stereoselectivity. Therefore, oxidative radical cyclization assisted by manganese(III) acetate serves as an important step in obtaining spiro-, tricyclic, tetracyclic, and polycyclic derivatives of these compounds. Manganese(III)-based reactions offer a single-step regio- and ste

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36

Srivastava, Satyam. "RECENT ADVANCES IN SURFACTANT-ENHANCED ORGANIC SYNTHESIS IN AQUEOUS MICELLES." Azerbaijan Chemical Journal, no. 3 (June 24, 2025): 105–22. https://doi.org/10.32737/0005-2531-2025-3-105-122.

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Green chemistry aims to minimize the environmental impact of chemical processes by utilizing sustainable and eco-friendly methodologies. Micelles, self-assembled structures formed by surfactants in aqueous solutions, have emerged as an effective reaction medium for organic transformations due to their inexpensive and environmentally benign nature. This review covers the designer reusable surfactants (viz., Brij-35, Coolade, SDS, Triton X-100, TPGS-750-M, NIPAAm-b-PEG, etc.) and their use in aqueous micelles to facilitate a wide range of organic transformations for the carbon-carbon and carbon-

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37

Carroll, AR, RW Read, and WC Taylor. "Intramolecular Oxidative Coupling of Aromatic Compounds. VII. A Convenient Synthesis of (±)-Deoxyschizandrin." Australian Journal of Chemistry 47, no. 8 (1994): 1579. http://dx.doi.org/10.1071/ch9941579.

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A convenient synthesis of (�)-deoxyschizandrin was achieved through the key step of reductive coupling of the bisacetonylbiphenyl (3). The latter compound was synthesized by oxidative cleavage of the bis olefin (5) formed by Claisen rearrangement of the bismethallyl ether of 2,2′,4,4′-tetramethoxybiphenyl-3,3′-diol. The synthesis of 2,2′,4,4′-tetramethoxy-6,6′-di(prop 1-enyl)biphenyl-3,3′-diol (2) is also described. The diphenolic oxidation of (2) did not lead to products with β,β′ carbons linked.

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38

Ha, Phuong T. M., Thien N. Lieu, Son H. Doan, et al. "Indium-based metal–organic frameworks as catalysts: synthesis of 2-nitro-3-arylimidazo[1,2-a]pyridines via oxidative amination under air using MIL-68(In) as an effective heterogeneous catalyst." RSC Advances 7, no. 37 (2017): 23073–82. http://dx.doi.org/10.1039/c7ra02802d.

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The metal–organic framework MIL-68(In) has emerged as a productive heterogeneous catalyst for the synthesis of 2-nitro-3-arylimidazo[1,2-a]pyridines via oxidative amination between 2-aminopyridines and nitroalkenes using air as an oxidation agent.

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39

Ndoile, Monica M., and Fanie R. van Heerden. "Total synthesis of ochnaflavone." Beilstein Journal of Organic Chemistry 9 (July 8, 2013): 1346–51. http://dx.doi.org/10.3762/bjoc.9.152.

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The first total syntheses of ochnaflavone, an asymmetric biflavone consisting of apigenin and luteolin moieties, and the permethyl ether of 2,3,2'',3''-tetrahydroochnaflavone have been achieved. The key steps in the synthesis of ochnaflavone were the formation of a diaryl ether and ring cyclization of an ether-linked dimeric chalcone to assemble the two flavone nuclei. Optimal experimental conditions for the oxidative cyclization to form ochnaflavone were established.

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40

Krauss, AS, and WC Taylor. "Intramolecular Oxidative Coupling of Aromatic Compounds. III. Monophenolic Substrates." Australian Journal of Chemistry 45, no. 5 (1992): 925. http://dx.doi.org/10.1071/ch9920925.

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The synthesis of (2RS,3SR)-4-(4-hydroxy-3,5-dimethoxyphenyl)-2,3-dimethyl-1-(3,4,5-trimethoxypheny1)butan-1-one (9) is described. Monophenolic oxidative coupling of (9) did not give any useful result. Oxidation of the derived acetoxy compound (18) by chemical and electrochemical methods gave aryltetralin derivatives through aryl-benzyl coupling.

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41

Wei, Xiao-Hong, Gang-Wei Wang, and Shang-Dong Yang. "Enantioselective synthesis of arylglycine derivatives by direct C–H oxidative cross-coupling." Chemical Communications 51, no. 5 (2015): 832–35. http://dx.doi.org/10.1039/c4cc07361d.

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A new method for the synthesis of chiral α-amino acid derivatives by enantioselective C–H arylation of N-aryl glycine esters with aryl boric acids by direct C–H oxidative cross-coupling has been performed. This work successfully integrates the direct C–H oxidation with asymmetric arylation and exhibits excellent enantioselectivity.

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42

Abrashev, Radoslav, Ekaterina Krumova, Penka Petrova, et al. "A Possible Involvement of Sialidase in the Cell Response of the Antarctic Fungus Penicillium griseofulvum P29 to Oxidative Stress." Life 15, no. 6 (2025): 926. https://doi.org/10.3390/life15060926.

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Sialidases/neuraminidases remove terminal sialic acid residues from glycoproteins, glycolipids, and oligosaccharides. Our previous research has revealed the distribution of sialidase in non-clinical fungal isolates from different ecological niches, including Antarctica. Fungi adapted to extremely low temperatures possess defense mechanisms necessary for their survival such as the response against oxidative stress. The relationship between oxidative stress and sialidase synthesis has been studied extremely sparsely. The aim of the present study was to investigate the involvement of sialidase in

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Ábrigo, Johanna, Alvaro A. Elorza, Claudia A. Riedel, et al. "Role of Oxidative Stress as Key Regulator of Muscle Wasting during Cachexia." Oxidative Medicine and Cellular Longevity 2018 (2018): 1–17. http://dx.doi.org/10.1155/2018/2063179.

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Skeletal muscle atrophy is a pathological condition mainly characterized by a loss of muscular mass and the contractile capacity of the skeletal muscle as a consequence of muscular weakness and decreased force generation. Cachexia is defined as a pathological condition secondary to illness characterized by the progressive loss of muscle mass with or without loss of fat mass and with concomitant diminution of muscle strength. The molecular mechanisms involved in cachexia include oxidative stress, protein synthesis/degradation imbalance, autophagy deregulation, increased myonuclear apoptosis, an

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44

Zuñiga-Díaz, J., E. Reyes-Dorantes, A. Quinto-Hernandez, J. Porcayo-Calderon, J. G. Gonzalez-Rodriguez, and L. Martinez-Gomez. "Biodiesel from “Morelos” Rice: Synthesis, Oxidative Stability, and Corrosivity." Journal of Chemistry 2018 (2018): 1–11. http://dx.doi.org/10.1155/2018/4595130.

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Rice bran is a by-product of great production worldwide and its use for the synthesis of biodiesel does not affect the food chain and therefore it is an excellent alternative for the production of biofuels with low carbon footprint. In this work, the synthesis of biodiesel was carried out from the raw rice bran oil of a kernel variety called “Morelos rice.” The stability and corrosivity characteristics of biodiesel were determined. Biodiesel stability was determined both under storage conditions and under accelerated oxidation conditions, and its corrosivity was evaluated by electrochemical im

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45

Cheng, Peter T. W., and Stewart McLean. "A total synthesis of a protected form of the secoxyloganin aglucone." Canadian Journal of Chemistry 67, no. 2 (1989): 261–67. http://dx.doi.org/10.1139/v89-043.

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A synthesis is described that leads from cyclopentadiene through 5-norbornen-2-one to the monosubstituted cyclopentenone 5; a vinyl substituent is attached by the reaction of a cuprate, and the enolate intermediate is trapped as the silyl enol ether 4, which is converted to 19, a product with the 10-carbon framework and stereochemistry of the secoxyloganin aglucone, and with all functional groups differentially protected and in the correct oxidation state. Explorations of the cuprate reaction required to convert the cyclopentenone 5 to the siloxycyclopentene 4 and of the reactions required for

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Moro, Cédric, Sudip Bajpeyi, and Steven R. Smith. "Determinants of intramyocellular triglyceride turnover: implications for insulin sensitivity." American Journal of Physiology-Endocrinology and Metabolism 294, no. 2 (2008): E203—E213. http://dx.doi.org/10.1152/ajpendo.00624.2007.

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Increased intramyocellular triglyceride (IMTG) content is found in both insulin-sensitive endurance-trained subjects and insulin-resistant obese/type 2 diabetic subjects. A high turnover rate of the IMTG pool in athletes is proposed to reduce accumulation of lipotoxic intermediates interfering with insulin signaling. IMTG turnover is a composite measure of the dynamic balance between lipolysis and lipid synthesis; both are influenced by mitochondrial fat oxidation and plasma free fatty acid availability. Therefore, more attention should be given to the factors controlling the rate of turnover

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Canty, Allan J. "The +IV Oxidation State in Organopalladium Chemistry." Platinum Metals Review 37, no. 1 (1993): 2–7. http://dx.doi.org/10.1595/003214093x37127.

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The organometallic chemistry of palladium is dominated by the +II oxidation state, and the chemistry of complexes containing simple organic groups bonded to palladium in the +IV oxidation state has developed only recently. Organic synthesis and catalytic reactions that may involve undetected palladium(IV) intermediates have been suggested frequently, and the new oxidation state +IV chemistry provides some support for these proposals, and gives encouragement for the development of new systems involving palladium(IV). The chemistry of organopalladium(IV) is reviewed here, and possible catalytic

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Ma, Chen, Huanhuan Liu, and Xinfeng Wang. "Synthesis of Imidazo[1,5-a]quinolines via Metal-Free Oxidative Amination of sp3 C–H Bonds." Synthesis 50, no. 14 (2018): 2761–67. http://dx.doi.org/10.1055/s-0037-1610137.

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A novel oxidative amination of sp3 C–H bonds was developed for the efficient synthesis of imidazo[1,5-a]quinolines from readily available α-amino acids and (2-azaaryl)methanes. This domino protocol, which was established in a TBAI-TBHP oxidation system, includes transition-metal-free decarboxylation and intramolecular cyclization. This method represented a new avenue for the synthesis of N-heterocycles using 2-methylquinolines as the synthon of quinoline-2-carbaldehydes.

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Sugiura, Ken-ichi, and Subas Rajbangshi. "An Alternative Synthesis of Bipyrenol: A High-Yield Oxidative Coupling Reaction of a Pyrene Derivative with Cu(BF4)2·nH2O." Synthesis 49, no. 14 (2017): 3145–48. http://dx.doi.org/10.1055/s-0036-1588819.

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An alternative synthesis has been developed with the objective of extending the applications of bipyrenol in mind. The key reaction involves the oxidative coupling of 2-hydroxypyrene menthyl carbonate to afford the corresponding pyrene dimer. In marked contrast to our previous method, i.e., the oxidation of 2-hydroxypyrene, the revised method is a clean and high-yielding reaction. By optimizing the reaction conditions, the yield of the alternative synthesis is increased to 88%.

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Guo, Caifang, Yi Zhang, Dongying Bai, et al. "Aspirin Eugenol Ester Alleviates Energy Metabolism Disorders by Reducing Oxidative Damage and Inflammation in the Livers of Broilers Under High-Stocking-Density Stress." International Journal of Molecular Sciences 26, no. 5 (2025): 1877. https://doi.org/10.3390/ijms26051877.

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This study aimed to evaluate the effects of aspirin eugenol ester (AEE) on growth performance, oxidative liver damage, inflammation, and liver metabolomics in broilers under high-stocking-density (HSD) stress. A total of 360 broilers were divided into four groups: normal density (ND, 14/m2), high density (HD, 22/m2), ND-AEE (ND + 0.01% AEE), and HD-AEE (HD + 0.01% AEE). HSD decreased total antioxidant capacity, increased malondialdehyde (MDA) levels, and elevated the expression of cyclooxygenase-2 (COX-2) and microsomal prostaglandin E synthase-1 (mPGES-1) mRNA, which contributed to the reduce

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