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Relevant bibliographies by topics / Rotenoids

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Academic literature on the topic 'Rotenoids'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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Journal articles on the topic "Rotenoids"

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Vats, Sharad, and Preeti Mehra. "Insecticidal Active Rotenoids from Plant Parts and Callus Culture of Medicago sativa L. from a Semiarid Region of India (Rajasthan)." Current Bioactive Compounds 16, no. 6 (October 2, 2020): 937–41. http://dx.doi.org/10.2174/1573407215666190628145149.

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Background: Vector-borne diseases are quite prevalent globally and are one of the major causes of deaths due to infectious diseases. There is an availability of synthetic insecticides, however, their excessive and indiscriminate use have resulted in the emergence of resistant varieties of insects. Thus, a search for novel biopesticide has become inevitable. Methods: Rotenoids were isolated and identified from different parts of Medicago sativa L. This group of metabolites was also identified in the callus culture, and the rotenoid content was monitored during subculturing for a period of 10 months. Enhancement of the rotenoid content was evaluated by feeding precursors in a tissue culture medium. Results: Four rotenoids (elliptone, deguelin, rotenone and Dehydrorotenone) were identified, which were confirmed using spectral and chromatographic techniques. The maximum rotenoid content was found in the seeds (0.33±0.01%), followed by roots (0.31±0.01%) and minimum in the aerial parts (0.20±0.05%). A gradual decrease in the rotenoid content was observed with the ageing of subcultured tissue maintained for 10 months. The production of rotenoids was enhanced up to 2 folds in the callus culture using amino acids, Phenylalanine and Methionine as precursors as compared to the control. The LC50 value of the rotenoids was found to be 91 ppm and 162 ppm against disease vectors of malaria and Dracunculiasis, respectively. Conclusion: The study projects M. sativa as a novel source of biopesticide against the disease vectors of malaria and Dracunculiasis. The use of precursors to enhance the rotenoid content in vitro can be an effective venture from a commercial point of view.

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Ren, Yulin, Judith Gallucci, and A. Kinghorn. "An Intramolecular CAr–H•••O=C Hydrogen Bond and the Configuration of Rotenoids." Planta Medica 83, no. 14/15 (April 20, 2017): 1194–99. http://dx.doi.org/10.1055/s-0043-108910.

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AbstractOver the past half a century, the structure and configuration of the rotenoids, a group of natural products showing multiple promising bioactivities, have been established by interpretation of their NMR and electronic circular dichroism spectra and confirmed by analysis of single-crystal X-ray diffraction data. The chemical shift of the H-6′ 1H NMR resonance has been found to be an indicator of either a cis or trans C/D ring system. In the present study, four structures representing the central rings of a cis-, a trans-, a dehydro-, and an oxadehydro-rotenoid have been plotted using the Mercury program based on X-ray crystal structures reported previously, with the conformations of the C/D ring system, the local bond lengths or interatomic distances, hydrogen bond angles, and the H-6′ chemical shift of these compounds presented. It is shown for the first time that a trans-fused C/D ring system of rotenoids is preferred for the formation of a potential intramolecular C6′–H6′•••O=C4 H-bond, and that such H-bonding results in the 1H NMR resonance for H-6′ being shifted downfield.

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Tahara, Satoshi, Eriko Narita, John L. Ingham, and Junya Mizutani. "New Rotenoids from the Root Bark of Jamaican Dogwood (Piscidia erythrina L.)." Zeitschrift für Naturforschung C 45, no. 3-4 (April 1, 1990): 154–60. http://dx.doi.org/10.1515/znc-1990-3-403.

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Abstract A further investigation of the root bark constituents of Jamaican dogwood (Piscidia erythrina) has revealed two new pyrano-rotenoids, (+)-erythynone and (+)-12a-hydroxyerythy-none. Both compounds co-occur with (-)-rotenone, and two additional rotenoids [(-)-12a -hydroxyrotenone and (-)-villosinol] not previously isolated from P. erythrina. Root extracts were also found to contain the rare isoflavone durmillone. The stereochemistry of all five Piscidia rotenoids was examined by ORD and CD spectrometry. These studies indicated that erythynone and 12 a-hydroxyerythynone were antipodal to naturally occurring (-) -6 aS; 12 aS-rotenone at the B/C ring junction.

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Mkindi, Angela G., Yolice Tembo, Ernest R. Mbega, Beth Medvecky, Amy Kendal-Smith, Iain W. Farrell, Patrick A. Ndakidemi, Steven R. Belmain, and Philip C. Stevenson. "Phytochemical Analysis of Tephrosia vogelii across East Africa Reveals Three Chemotypes that Influence Its Use as a Pesticidal Plant." Plants 8, no. 12 (December 12, 2019): 597. http://dx.doi.org/10.3390/plants8120597.

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Tephrosia vogelii is a plant species chemically characterized by the presence of entomotoxic rotenoids and used widely across Africa as a botanical pesticide. Phytochemical analysis was conducted to establish the presence and abundance of the bioactive principles in this species across three countries in East Africa: Tanzania, Kenya, and Malawi. Analysis of methanolic extracts of foliar parts of T. vogelii revealed the occurrence of two distinct chemotypes that were separated by the presence of rotenoids in one, and flavanones and flavones that are not bioactive against insects on the other. Specifically, chemotype 1 contained deguelin as the major rotenoid along with tephrosin, and rotenone as a minor component, while these compounds were absent from chemotype 2, which contained previously reported flavanones and flavones including obovatin-3-O-methylether. Chemotype 3 contained a combination of the chemical profiles of both chemotype 1 and 2 suggesting a chemical hybrid. Plant samples identified as chemotype 1 showed chemical consistency across seasons and altitudes, except in the wet season where a significant difference was observed for samples in Tanzania. Since farmers are unable to determine the chemical content of material available care must be taken in promoting this species for pest management without first establishing efficacy. While phytochemical analysis serves as an important tool for quality control of pesticidal plants, where analytical facilities are not available simple bioassays could be developed to enable extension staff and farmers to determine the efficacy of their plants and ensure only effective materials are adopted.

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Abidi, S. L. "Optical resolution of rotenoids." Journal of Heterocyclic Chemistry 24, no. 3 (May 1987): 845–52. http://dx.doi.org/10.1002/jhet.5570240358.

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Somleva, T., and I. Ognyanov. "New Rotenoids inAmorpha fruticosaFruits." Planta Medica 51, no. 03 (June 1985): 219–21. http://dx.doi.org/10.1055/s-2007-969462.

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Ahmed, Maniruddin, Bidyut Kanti Datta, and Abu Shara Shamsur Rouf. "Rotenoids from Boerhaavia repens." Phytochemistry 29, no. 5 (January 1990): 1709–10. http://dx.doi.org/10.1016/0031-9422(90)80156-b.

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Kilbourn, Michael R., Avgui Charalambous, Kirk A. Frey, Phillip Sherman, Donald S. Higgins, and J. Timothy Greenamyre. "Intrastriatal Neurotoxin Injections Reduce in Vitro and in Vivo Binding of Radiolabeled Rotenoids to Mitochondrial Complex I." Journal of Cerebral Blood Flow & Metabolism 17, no. 3 (March 1997): 265–72. http://dx.doi.org/10.1097/00004647-199703000-00003.

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The in vivo and in vitro bindings of radiolabeled rotenoids to mitochondrial complex I of rat striatum were examined after unilateral intrastriatal injections of quinolinic acid or 1-methyl-4-phenylpyridinium salt (MPP+). Quinolinic acid produced significant, similar losses of in vivo binding of [11C]dihydrorotenol ([11C]DHROL: 40%) and in vitro binding of [3H]dihydrorotenone ([3H]DHR: 53%) in the injected striata at 13 days after the injection of neurotoxin. MPP+ reduced in vivo binding of [11C]DHROL (up to −55%) as measured 1.5 to 6 h after its administration. Reductions of in vivo [11C]DHROL binding after either quinolinic acid or MPP+ injections did not correlate with changes in striatal blood flow as measured with [14C]iodoantipyrine. These results are consistent with losses of complex I binding sites for radiolabeled rotenoids, produced using cell death (quinolinic acid) or direct competition for the binding site (MPP+). Appropriately radiolabeled rotenoids may be useful for in vivo imaging studies of changes of complex I in neurodegenerative diseases.

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Kostova, Ivanka, Nadejda Spassovska, Lilyana Maneva, Evgeni Golovinsky, and Iliya Ognyanov. "Reaction of Rotenoids with Hydrazine." HETEROCYCLES 24, no. 9 (1986): 2471. http://dx.doi.org/10.3987/r-1986-09-2471.

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Andrei, Cesar C., Paulo C. Vieira, João B. Fernandes, M. Fátima das G. F. da Silva, and Edson Rodrigues^Fo. "Dimethylchromene rotenoids from Tephrosia candida." Phytochemistry 46, no. 6 (November 1997): 1081–85. http://dx.doi.org/10.1016/s0031-9422(97)00405-6.

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More sources

Dissertations / Theses on the topic "Rotenoids"

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Orchison, J. J. A. "New synthetic approaches to rotenoids." Thesis, University of Nottingham, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355421.

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Amos, P. C. "Palladium mediated couplings for the synthesis of rotenoids." Thesis, University of Nottingham, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235939.

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Junan, Siti Asiah Ahmad. "Synthesis of O-heterocycles by free radical methodology." Thesis, University of Nottingham, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258235.

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Vasconcelos, Jackson Nunes e. "AvaliaÃÃo do potecial quÃmico e biolÃgico de Tephrosia toxicaria Pers. (Fabaceae)." Universidade Federal do CearÃ, 2010. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=4657.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior
Tephrosia toxicaria Pers. (Fabaceae) popularmente conhecida como âtimbÃ de caienaâ, Ã utilizada na lavoura como defensivo agrÃcola e na pesca para paralisar peixes, devido sua atividade ictiotÃxica. Este trabalho relata o estudo quÃmico de T. toxicaria e avaliaÃÃo das atividades antioxidante e larvicida sobre Aedes aegypti. O estudo quÃmico permitiu o isolamento de dez flavonoides (TTP-1 â luteolina, TTP-3 â 6a,12a-desidro- a-toxicarol, TTP-4 â a-toxicarol, TTP-5 â obovatina, TTP-6 â deguelina, TTP-8 â villosinol, TTP-9 â 12a-hidroxi-a-toxicarol, TTP-10 â sumatrol, TTP-11 â 12a-hidroxirotenona e TTP-12 â tephrosina) â sendo oito deles rotenoides â uma cromona (TTP-13 â 6,7-dimetoxicromona) e a mistura dos esteroides sitosterol e estigmasterol, nas suas formas simples e glicosiladas. Ensaios larvicidas e antioxidantes foram realizados com diversos extratos, partiÃÃes e com alguns dos metabÃlitos secundÃrios isolados. Devido Ã presenÃa de rotenoides, compostos que tÃm sido utilizados no controle de pragas agrÃcolas desde o sÃculo XIX, o estudo de T. toxicaria se mostrou bastante promissor, com diversas amostras ativas, apresentando atividade comparÃvel Ã da rotenona, composto utilizado como padrÃo positivo do ensaio larvicida. Os resultados dos ensaios antioxidantes sugerem T. toxicaria como uma fonte potencial desses agentes, provavelmente devido Ã presenÃa de flavonoides. As substÃncias isoladas foram identificadas por mÃtodos espectromÃtricos e espectroscÃpicos (IV, EM, RMN 1H e RMN 13C), incluindo RMN bidimensional (HMBC, HSQC e COSY) e por comparaÃÃo com dados da literatura.
Tephrosia toxicaria Pers. (Fabaceae) popularly known as "timbÃ de caiena" is used as pesticide and fishing poison, because its activity icthyotoxic. This work reports the chemical study of T. toxicaria and its larvicidal and antioxidant activities evaluation. Phytochemical investigation led to the isolation of ten flavonoids (TTP-1 â luteolin, TTP-3 â 6a,12a-dehydro-a-toxicarol, TTP-4 â a-toxicarol, TTP-5 â obovatin, TTP-6 â deguelin, TTP-8 â villosinol, TTP-9 â 12a-hydroxy-a-toxicarol, TTP-10 â sumatrol, TTP-11â12a-hydroxyrotenone and TTP-12 â tephrosin) â eight of them rotenoids â one cromone (TTP-13 â 6,7-dimethoxychromone) and the mixture of steroids sitosterol and stigmasterol, in their simple forms and glycosylated. Antioxidant and larvicidal assays were performed with several extracts, partitions and with some of the secondary metabolities isolated. Due to the presence of rotenoids, compounds have been used to control in agricultural pest since the XIX century, the study of T. toxicaria was quite promising, with several active extracts, with activity comparable to that of rotenone, compound used as a positive test. Its antioxidant activity tests shown T. toxicaria as a potential source of these agents, probably due to the presence of flavonoids, compounds characteristic for presenting various types of biological activities. The substances were isolated and its structures determined by spectroscopic and spectrometric methods (IR, EM, 1H NMR and 13C NMR), including two-dimensional NMR (HMBC, HSQC and COSY) and by comparison with literature data.

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Sanders, M. "Experiments in rotenoid biosynthesis." Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376182.

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Van, Bruggan N. "Enzyme studies related to rotenoid biosynthesis." Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381078.

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GEHROLD, NICOLAI. "Nouvelles approches synthetiques aux flavanones et aux rotenoides." Université Louis Pasteur (Strasbourg) (1971-2008), 1998. http://www.theses.fr/1998STR13172.

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Le travail decrit dans cette these porte sur la synthese de molecules de la famille des flavonoides. Pour l'acces a des 5,7-dihydroxyflavanones substituees, 3 syntheses totales tres differentes ont ete effectuees. La premiere a utilise une strategie biomimetique pour construire le noyau a a partir d'un precurseur polycarbonyle. La seconde synthese a permis d'ameliorer nettement le rendement global en produit racemique en partant d'un noyau a preforme. L'utilisation d'un sulfoxyde optiquement actif comme auxiliaire chiral presente une nouvelle voie de synthese de flavanones enantiomeriquement pures. Le centre asymetrique a ete forme par addition 1,4 et les diastereomeres obtenus ont ete separes par chromatographie. Deux methodes differentes ont ete decrites pour l'introduction directe d'un substituant hydroxymethyle sur le noyau a. Les resultats obtenus ont permis de rectifier la structure d'une flavanone naturelle : le leridol. Une approche de la synthese d'un rotenoide : la degueline, est egalement decrite dans ce memoire. L'etape cle etait le couplage entre l'anion lithie d'une cyanhydrine silylee et un chlorure benzylique.

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Santos, Rauldenis Almeida Fonseca. "Estudo fitoquímico e avaliação biológica dos flavonoides isolados de clitoria fairchildiana R. A. Howard." Instituto de Química, 2014. http://repositorio.ufba.br/ri/handle/ri/19139.

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A espécie Clitoria fairchildiana R. A. Howard., sinonímia Clitoria racemosa Benth., é popularmente conhecida como sombreiro e utilizada na arborização urbana, apresentando diversos relatos de isolamento de flavonoides com atividades antioxidante, citotóxica, anti- inflamatória e alelopática. O presente trabalho descreve o estudo químico das raízes e pétalas da Clitoria fairchildiana, permitindo o isolamento dos flavonoides clitoriacetal (2), 6- desoxiclitoriacetal (3), stemonal (4), stemonona (5), canferol (6), quercetina (7), vitexina (8), astragalina (9) e dos fitoesteroides β-sitosterol (1) e estigmasterol (1a), além da identificação por CG-EM de ácidos graxos e fitol. Também foram realizados ensaios biológicos, dos extratos e substâncias isoladas, tais como de atividade frente Artemia salina, antioxidante e de inibição da enzima acetilcolinesterase. As substâncias clitoriacetal (2) e 6-desoxiclitoriacetal (3) apresentaram moderada atividade frente Artemia salina, com valores de DL50=515,3μg.mL-1 e DL50=260,5μg.mL-1, respectivamente. Enquanto que a astragalina (9) apresentou uma maior atividade (DL50=77,1μg.mL-1). No teste antioxidante de sequestro do radical livre DPPH, a quercetina (6) e o canferol (5) apresentaram as maiores atividades antioxidante. Diferentes extratos da espécie vegetal foram analisados por CLAE-DAD, determinando que os rotenoides clitoriacetal (2) e o 6-desoxiclitoriacetal (3), são encontrados em maior quantidade nas raízes, contudo não são encontrados nas folhas e pétalas da espécie. As substâncias isoladas foram identificadas por métodos espectrométricos (IV, UV/Vis, EM, RMN de 1H e RMN de 13C) e por comparação com dados da literatura. Dessa forma, este trabalho contribui para a taxonomia da espécie Clitoria fairchildiana, descrevendo o primeiro estudo fitoquímico das pétalas dessa espécie, além de relatar o primeiro isolamento da stemonona (5), obtido anteriormente apenas por modificação estrutural.
The species Clitoria fairchildiana R. A. Howard., Synonymy Clitoria racemosa Benth., is popularly known as sombrero and used in urban forestry, with several reports of isolation of flavonoids with antioxidant, cytotoxic, anti-inflammatory and allelopathic activities. This work describes the chemical study of the roots and petals of Clitoria fairchildiana, allowing the isolation of flavonoids clitoriacetal (2), 6-deoxyclitoriacetal (3), stemonal (4), stemonone (5), kaempferol (6), quercetin (7), vitexin (8), astragalina (9) and fitoesteroides β-sitosterol (1) and stigmasterol (1a), besides the identification by GC-MS of fatty acids and phytol. Biological assays of the extracts and isolated substances, such as activity against, Brine shrimp, antioxidant and inhibition of acetylcholinesterase were also conducted. Biological assays of extracts and pure compounds such as facing activity Brine shrimp, antioxidant and inhibiting acetylcholinesterase enzyme were also performed. The substances clitoriacetal (2) and 6-deoxyclitoriacetal (3) showed moderate activity against Brine shrimp, with values LD50=515.3 μg.mL-1 and LD50=260.5 μg.mL-1, respectively. While astragalina (9) showed increased activity (LD50=77.1 μg.mL-1). In antioxidant test kidnapping of free radical DPPH, quercetin (6) and kaempferol (5) showed the highest antioxidant activities. Different extracts of the plant species were analyzed by HPLC-DAD, determining that the rotenoids clitoriacetal (2) and 6-deoxyclitoriacetal (3), are found in greater amounts in the roots, but are not found in the leaves and petals of the species. The compounds were identified by spectroscopic methods (IR, UV/Vis, MS, 1H NMR and 13C NMR) and by comparison with the literature data. Thus, this work contributes to the taxonomy of species Clitoria fairchildiana, describing the first phytochemical study of the petals of this species, in addition to reporting the first isolation of stemonone (5), obtained previously only by structural modification.

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Dutra, Viviane. "Efeito de inseticidas botânicos sobre Hypothenemus hampei (Ferrari, 1867) (Coleoptera: Curculionidae) e fotodegradação dos rotenoides de sementes de Tephosia vogelii Hook f." Universidade Estadual de Londrina. Centro de Ciências Agrárias. Programa de Pós-Graduação em Agronomia, 2016. http://www.bibliotecadigital.uel.br/document/?code=vtls000209309.

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O método de controle mais utilizado no controle de Hypothenemus hampei (Ferrari) (Coleoptera: Curculionidae) é o químico, sendo que o inseticida mais utilizado foi o Endosulfan. A agricultura orgânica e a crescente busca por alimentos sem contaminantes não permitem a utilização de produtos sintéticos, sendo assim a busca por métodos alternativos de controle é essencial para atender as necessidades desses agricultores. O objetivo do trabalho é avaliar o efeito inseticida de compostos naturais presentes no extrato de Tephrosia vogelli, óleo bruto das sementes de Gossypium hirsutum L. e óleo bruto das sementes de Ricinus communis L. sobre Hypothenemus hampei e; o comportamento dos rotenoides presentes no extrato de sementes de Tephrosia vogelli quando expostos a radiação solar. Foi testado o efeito de aplicação tópica, superfície contaminada e ingestão para o controle da broca-do-café. O extrato de T. vogelii apresentou melhor resultado pela via de aplicação por contato. Os óleos de R. communis e G. hirsutum provocaram mortalidade por ação de ingestão. O comportamento dos rotenoides tefrosina e deguelina, isolados e inseridos no extrato bruto de semente de T. vogelii foram submetidas à exposição à luz por diferentes tempos. Os rotenoides puros tefrosina e deguelina sofreram degradação quando expostos à luz, porém não houve degradação no extrato bruto das sementes de T. vogelii. A utilização do extrato oleoso de T. vogelii e dos óleos de R. communis e G. hirsutum ocasionou efeito inseticida sobre H. hampei. Rotenoides puros sofrem degradação quando expostos à luz. A tefrosina presente no extrato bruto das sementes de T. vogelii não sofreu degradação devido à composição química do extrato.
The control method most used for controlling Hypothenemus hampei (Ferrari) (Coleoptera: Curculionidae) is chemical, and the most used insecticide was Endosulfan. Organic agriculture and the growing search for food without contaminants do not allow the use of synthetics, so the search for alternative control methods is essential to meet the needs of these farmers. The objective is to evaluate the effect of insecticide of natural compounds present in crude extract of Tephrosia vogelli seeds, crude oil from Gossypium hirsutum L. seeds and crude oil from Ricinus communis L. seeds on Hypothenemus hampei and; the behavior of rotenoids present in crude extract of Tephrosia vogelli seeds, when exposed to sunlight. The effect of topical application, contaminated surface and ingestion for controlling the coffee berry borer was tested. T. vogelii extract showed better results for the contact application means. The oils of R. communis and G. hirsutum caused mortality by intake. The behavior of tephrosin and deguelin rotenoids isolated and inserted in the crude extract of T. vogelii seed were subjected to exposure to light for different times. Tephrosin and deguelin pure rotenoids suffered degradation when exposed to light, but there was no degradation in the crude extract of T. vogelii seeds. The use of oily extract of T. vogelii and oils of R. communis and G. hirsutum caused insecticidal effect on coffee berry borer. Pure rotenoids suffer degradation when exposed to light. The tephrosin present in the crude extract of T. vogelii seeds did not suffer degradation, due to the chemical composition of the extract.

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Lanver, Andreas. "Studien zur übergangsmetallvermittelten Synthese von bioaktiven carbocyclischen Nucleosiden und von Rotenoiden /." 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=017062177&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Book chapters on the topic "Rotenoids"

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Lambert, N., M. F. Trouslot, and H. Chrestin. "Tephrosia vogelii Hook f.: In Vitro Culture, and the Production of Rotenoids and Other Secondary Metabolites." In Biotechnology in Agriculture and Forestry, 443–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-642-58833-4_22.

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"Chromanochromanones (The Rotenoids)." In Chemistry of Heterocyclic Compounds: A Series Of Monographs, 272–327. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470186879.ch7.

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Conference papers on the topic "Rotenoids"

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Lee, Su-Chan, Ju-Sung Lee, Seung-Yeob Hyun, Hoon Choi, Hongchan An, Kyu-Won Kim, Young-Ger Suh, and Ho-Young Lee. "Abstract 3196: Antitumor effect of a Compound A, a derivative of a naturally occurring rotenoid deguelin, by inhibition of ATP binding to heat shock protein 90." In Proceedings: AACR Annual Meeting 2014; April 5-9, 2014; San Diego, CA. American Association for Cancer Research, 2014. http://dx.doi.org/10.1158/1538-7445.am2014-3196.

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