Results 71 to 80 of about 7,497 (214)

Reaction Mechanisms of H₂S Oxidation by Naphthoquinones

Antioxidants
1,4-naphthoquinones (NQs) catalytically oxidize H2S to per- and polysufides and sulfoxides, reduce oxygen to superoxide and hydrogen peroxide, and can form NQ-SH adducts through Michael addition.
Kenneth R. Olson, Kasey J. Clear, Tsuyoshi Takata, Yan Gao, Zhilin Ma, Ella Pfaff, Anthony Travlos, Jennifer Luu, Katherine Wilson, Zachary Joseph, Ian Kyle, Stephen M. Kasko, Prentiss Jones Jr, Jon Fukuto, Ming Xian, Gang Wu, Karl D. Straub   +16 more
doaj   +1 more source

PLS-Prediction and Confirmation of Hydrojuglone Glucoside as the Antitrypanosomal Constituent of Juglans Spp.

Molecules, 2015
Naphthoquinones (NQs) occur naturally in a large variety of plants. Several NQs are highly active against protozoans, amongst them the causative pathogens of neglected tropical diseases such as human African trypanosomiasis (sleeping sickness), Chagas ...
Therese Ellendorff, Reto Brun, Marcel Kaiser, Jandirk Sendker, Thomas J. Schmidt   +4 more
doaj   +1 more source

Synthesis of Dihydrofuro- and C-alkenylated Naphthoquinones Catalyzed by Manganese(III) Acetate [PDF]

, 2014
The easily synthesis of dihydrofuronaphthoquinones and C-alkenylated naphthoquinones has been investigated through the radical oxidative cyclization of 2-hydroxy-1,4-naphthoquinones and thiophene or furan substituted alkenes catalyzed by manganese(III)
Yilmaz, Mehmet, Alagoz, Oguzhan, GRAIFF, Claudia, MAGGI, Raimondo, O. Alagöz, Pekel, A. Tarik, A. T. Pekel, M. Yılmaz   +7 more
core   +1 more source

Stability of Hemoglobin and Albumin Adducts of Naphthalene Oxide, 1,2-Naphthoquinone, and 1,4-Naphthoquinone [PDF]

Toxicological Sciences, 2002
Naphthalene is an important industrial chemical, which has recently been shown to cause tumors of the respiratory tract in rodents. It is thought that one or more reactive metabolites of naphthalene, namely, naphthalene-1,2-oxide (NPO), 1,2-naphthoquinone (1,2-NPQ), and 1,4-naphthoquinone (1,4-NPQ) contribute to the tumorigenicity of this chemical ...
Melissa A, Troester, Andrew B, Lindstrom, Suramya, Waidyanatha, Lawrence L, Kupper, Stephen M, Rappaport   +4 more
openaire   +2 more sources

Antileishmanial Activity of 2-Methoxy-4H-spiro-[naphthalene-1,2′-oxiran]-4-one (Epoxymethoxy-lawsone): A Promising New Drug Candidate for Leishmaniasis Treatment

Molecules, 2018
Epoxymethoxylawsone is a naphthoquinone derivative promising as drug candidate for the treatment of leishmaniases. In the present work the effectiveness of epoxymethoxylawsone, and meglumine antimoniate on Leishmania (Leishmania) amazonensis parasites ...
Luiz Filipe Gonçalves Oliveira, Franklin Souza-Silva, Luzia Monteiro de Castro Côrtes, Lea Cysne-Finkelstein, Mirian Cláudia de Souza Pereira, Francisco Odêncio de Oliveira Junior, Rosa Teixeira Pinho, Suzana Corte Real, Saulo Cabral Bourguignon, Vitor Francisco Ferreira, Carlos Roberto Alves   +10 more
doaj   +1 more source

General scheme for preparing the 2-hydroxy-3-alkyl[1,4]naphthoquinones or 3-arylsulfanylmethyl[1,4]naphthoquinones under microwave irradiation.

, 2014
General scheme for preparing the 2-hydroxy-3-alkyl[1,4]naphthoquinones or 3-arylsulfanylmethyl[1,4]naphthoquinones under microwave irradiation.
Samanta E. T. Borborema (623657), Erika G. Pinto (493721), David R. Rocha (500433), Vitor F. Ferreira (500436), Thomas J. Schmidt (623656), Andre G. Tempone (493720), Isabela O. Santos (623655)   +6 more
core   +1 more source

Molecular Design Strategies for High‐Voltage Organic Cathodes

Advanced Energy Materials, Volume 16, Issue 34, 9 September 2026.
This work proposes molecular engineering strategies for high‐voltage organic cathode materials for Li‐ion batteries: (1) increase Li‐O coordination number (CN), (2) achieve a greater increase in aromaticity upon reduction (∆Aromaticity), and (3) add an electron‐withdrawing group (EWG), through a combined experimental and computational study on reported
Sungil Hong, Alae Eddine Lakraychi, Artur Lyssenko, Abhishek Ashwin Panchal, Harshan Reddy Gopidi, Pieremanuele Canepa, Rafael Gómez‐Bombarelli, Yan Yao, Rajeev Surendran Assary   +8 more
wiley   +1 more source

Antioxidant Chemistry of Phenolics in Chinese Herbal Medicines: A Holism‐Based Review

Chemistry &Biodiversity, Volume 23, Issue 9, September 2026.
Phenolic antioxidants in CHMs mainly include chalcone, stilbene, flavonoid, xanthone, and Diels–Alder‐type adducts. They undergo direct and indirect pathways to exert antioxidant action. The indirect pathway is transition metal‐chelating, while the direct pathway comprises several redox‐based reactions (e.g., SET and HAT) and RAF reactions.
Xican Li
wiley   +1 more source

Insecticidal 2-hydroxy-3-alkyl-1,4-naphthoquinones: correlation of inhibition of ubiquinol cytochrome c oxidoreductase (complex III) with insecticidal activity

, 2002
The insecticidal and in vitro activities of four homologous series of 2-hydroxy and acetoxy-3-substituted-1,4-naphthoquinones have been measured and correlated with their (Log)octanol/water partition coefficients (Log K-o/w).
Boogaard, A. B., Jewess, P. J., Khambay, B. P. S., Chamberlain, K., Devonshire, A. L.   +4 more
core   +1 more source

Synthesis and toxicity of substituted-1,4-naphthoquinones

, 2008
Naphthoquinones and their derivatives have been identified to have a broad range of biological activity. Recently, we reported the synthesis of solid-supported Fischer carbenes and their microwave-assisted Dötz benzannulation reaction producing ...
Martinez Rey, Nancy Elvira
core   +1 more source