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1. An Efficient Copper-Mediated Route for the Synthesis of 2-Substituted Benzothiazoles from Dithioesters and Investigation of Their Antibacterial Activities.

Author

Sukrutha, Kodipura P., Kiran, Kuppalli R., Gunashree, Kodagahally T., Divyashree, Shivakumar, Purusotham, Prerana, Sreenivasa, Marikunte Y., and Sadashiva, Maralinganadoddi P.

Subjects
ANTIBACTERIAL agents, GENTIAN violet, POLYKETIDES, ORGANIC synthesis, MASS spectrometry, SODIUM sulfate
Abstract

This article discusses the need for new molecules with better antibacterial properties due to increasing drug resistance. The authors propose a copper-mediated synthesis of benzothiazoles, which have shown effectiveness against bacterial diseases. They present an efficient method for the synthesis of these compounds using copper oxide. The article also discusses the synthesis and antibacterial activity of the compounds, as well as their ability to inhibit biofilm formation. Compound 5r showed significant inhibitory effects and biofilm inhibition percentages comparable to a traditional antibiotic. Further research is needed to validate its therapeutic use. The document provides information on the synthesis and characterization of various compounds derived from benzo[d]thiazole. The compounds were tested against different bacteria strains and showed promising antibacterial and antibiofilm activities. Computational studies were conducted to analyze the interactions between the compounds and specific proteins. The authors acknowledge the support of the National Facility Single Crystal Laboratory. [Extracted from the article]

Published
2024
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6. Synthesis, characterization and antibacterial evaluation of N‐(2‐Morpholinoethyl)‐3‐phenylquinoxalin‐2‐amine derivatives.

Author

Shruthi, Jeegundipattana B., Kiran, Kuppalli R., Divyashree, Shivakumar, Sreenivasa, Marikunte Y., and Sadashiva, Maralinganadoddi P.

Subjects
FOOD pathogens, METHYL groups, QUINOXALINES, SALMONELLA, ANTIBACTERIAL agents
Abstract

A series of substituted N‐(2‐Morpholinoethyl)‐3‐phenylquinoxalin‐2‐amines (5a–j) (5ab, 5ac) were synthesized in good yield and characterized for their structural confirmation. The pure quinoxaline products were screened for their in‐vitro antibacterial activity against Salmonella paratyphi, a well‐known food borne pathogen. The preliminary results revealed that among the series, compounds 5a, 5c, 5d, 5e, 5f, 5h, 5ab and 5ac bearing bromo, fluoro, methoxy, methyl groups at para position on phenyl ring which inturn substituted at third position of quinoxaline and methyl, benzoyl groups at sixth position on the quinoxaline were emerged as potential candidates by displaying antisalmonella activity. Among the potential candidates, compounds 5c, 5e, 5f and 5ac were effective against Salmonella whereas compounds 5a, 5f and 5ac effectively inhibited the biofilm formation of Salmonella. [ABSTRACT FROM AUTHOR]

Published
2023
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8. Fungal Planet description sheets : 1436 –1477

Author

Tan, Yu Pei, Bishop-Hurley, Sharon L., Shivas, Roger G., Cowan, Don, Maggs-Kölling, Gillian, Maharachchikumbura, Sajeewa S. N., Pinruan, Umpawa, Bransgrove, Kaylene L., De la Peña-Lastra, Saúl, Larsson, Ellen, Lebel, Teresa, Mahadevakumar, Shivannegowda, Mateos, Antonio, Osieck, Eduard R., Rigueiro-Rodríguez, Antonio, Sommai, Sujinda, Ajithkumar, Kadaiah, Akulov, Alex, Anderson, Freda E., Arenas, Francisco, Balashov, Sergey, Bañares, Ángel, Berger, Dave K., Bianchinotti, María V., Bien, Steffen, Bilański, Piotr, Boxshall, Amelia-Grace, Bradshaw, Michael, Broadbridge, Jasmin, Calaça, Francisco J.S., Campos-Quiroz, Carolina, Carrasco-Fernández, Jorge, Castro, Jean F., Chaimongkol, Soravit, Chandranayaka, Siddaiah, Chen, Yanpeng, Comben, David, Dearnaley, John, Ferreira-Sá, Antônio S., Dhileepan, Kunjithapatham, Díaz, Marina L., Divakar, Pradeep K., Xavier-Santos, Solange, Fernández-Bravo, Ana, Gené, Josepa, Guard, Frances E., Guerra, Matías, Gunaseelan, Sugantha, Houbraken, Jos, Janik-Superson, Katarzyna, Jankowiak, Robert, Jeppson, Mikael, Jurjević, Želko, Kaliyaperumal, Malarvizhi, Kelly, Lisa A., Kezo, Kezhocuyi, Khalid, Abdul N., Khamsuntorn, Phongsawat, Kidanemariam, Dawit, Kiran, Munaza, Lacey, Ernest, Langer, Gitta J., López-Llorca, Luis V., Luangsa-ard, Janet J., Lueangjaroenkit, Piyangkun, Lumbsch, H. Thorsten, Maciá-Vicente, Jose G., Mamatha Bhanu, Lakkur S., Marney, Thomas S., Marqués-Gálvez, José E., Morte, Asunción, Naseer, Arooj, Navarro-Ródenas, Alfonso, Oyedele, Oluwawapelumi, Peters, Sandra, Piskorski, Sebastian, Quijada, Luis, Ramírez, Gustavo H., Raja, Kanaga valli, Razzaq, Annum, Rico, Víctor J., Rodríguez, Antonio, Ruszkiewicz-Michalska, Małgorzata, Sánchez, Romina M., Santelices, Cecilia, Savitha, Attihalli S., Serrano, Miguel, Leonardo-Silva, Lucas, Solheim, Halvor, Somrithipol, Sayanh, Sreenivasa, Marikunte Y., Stępniewska, Hanna, Strapagiel, Dominik, Taylor, Tamara, Torres-Garcia, Daniel, Vauras, Jukka, Villarreal, Manuel, Visagie, Cobus M., Wołkowycki, Marek, Yingkunchao, Wittayothin, Zapora, Ewa, Groenewald, Johannes Z., Crous, Pedro W., Westerdijk Fungal Biodiversity Institute, Westerdijk Fungal Biodiversity Institute - Food and Indoor Mycology, Microbial Ecology (ME), Westerdijk Fungal Biodiversity Institute - Evolutionary Phytopathology, Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada, Universidad de Alicante. Instituto Multidisciplinar para el Estudio del Medio 'Ramón Margalef', and Fitopatología

Subjects
ITS nrDNA barcodes, LSU, new taxa, systematics, Plantenecologie en Natuurbeheer, Plant Ecology and Nature Conservation, Ecology, Evolution, Behavior and Systematics
Abstract

Novel species of fungi described in this study include those from various countries as follows: Argentina, Colletotrichum araujiae on leaves, stems and fruits of Araujia hortorum. Australia, Agaricus pateritonsus on soil, Curvularia fraserae on dying leaf of Bothriochloa insculpta, Curvularia millisiae from yellowing leaf tips of Cyperus aromaticus, Marasmius brunneolorobustus on well-rotted wood, Nigrospora cooperae from necrotic leaf of Heteropogon contortus, Penicillium tealii from the body of a dead spider, Pseudocercospora robertsiorum from leaf spots of Senna tora, Talaromyces atkinsoniae from gills of Marasmius crinis-equi and Zasmidium pearceae from leaf spots of Smilax glyciphylla. Brazil, Preussia bezerrensis fromair. Chile, Paraconiothyrium kelleni from the rhizosphere of Fragaria chiloensis subsp. chiloensis f. chiloensis. Finland, Inocybe udicola onsoilinmixedforest with Betula pendula, Populus tremula, Picea abies and Alnus incana. France, Myrmecridium normannianum on dead culm of unidentified Poaceae. Germany, Vexillomyces fraxinicola from symptomless stem wood of Fraxinus excelsior. India, Diaporthe limoniae on infected fruit of Limonia acidissima, Didymella naikii on leaves of Cajanus cajan, and Fulvifomes mangroviensis on basal trunk of Aegiceras corniculatum. Indonesia, Penicillium ezekielii from Zea mays kernels. Namibia, Neocamarosporium calicoremae and Neocladosporium calicoremae on stems of Calicorema capitata, and Pleiochaeta adenolobi on symptomatic leaves of Adenolobus pechuelii. Netherlands, Chalara pteridii on stems of Pteridium aquilinum, Neomackenziella juncicola (incl. Neomackenziella gen. nov.)and Sporidesmiella junci from dead culms of Juncus effusus. Pakistan, Inocybe longistipitata on soil in a Quercus forest. Poland, Phytophthora viadrina from rhizosphere soil of Quercus robur, and Septoria krystynae on leaf spots of Viscum album. Portugal (Azores), Acrogenospora stellata on dead wood or bark. South Africa, Phyllactinia greyiae on leaves of Greyia sutherlandii and Punctelia anae on bark of Vachellia karroo. Spain, Anteaglonium lusitanicum on decaying wood of Prunus lusitanica subsp. lusitanica, Hawksworthiomyces riparius from fluvial sediments, Lophiostoma carabassense endophytic in roots of Limbarda crithmoides, and Tuber mohedanoi from calcareussoils. Spain (Canary Islands), Mycena laurisilvae on stumps and woody debris. Sweden, Elaphomyces geminus from soil under Quercus robur. Thailand, Lactifluus chiangraiensis on soil under Pinus merkusii, Lactifluus nakhonphanomensis and Xerocomus sisongkhramensis on soil under Dipterocarpus trees. Ukraine, Valsonectria robiniae on dead twigs of Robinia hispida. USA, Spiralomyces americanus (incl. Spiralomyces gen. nov.) from office air. Morphological and culture characteristics are supported by DNA barcodes.

Published
2022

10. Synthesis of New Benzofuran-Pyrazole Hybrids as Potential Antibiofilm Agents

Author

Lingaraju, Gejjalagere S., Rakesh, Somashekaraiah, Kumar, Koravangala S.V., Rao, Kanchepalli P., Sreenivasa, Marikunte Y., and Sadashiva, Maralinganadoddi P.

Abstract

A new series of 3-aryl/heteroaryl-5-benzofurnyl pyrazoles [5(a-l)] were synthesized from 1,3-β-monothiodiketones through the cyclocondensation reaction with phenyl hydrazine in good yield and characterized by IR, 1H and 13C NMR, Mass and elemental analyses. All compounds were subjected to evaluate antimicrobial activity against various bacteria viz Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus subtilis, Escherichia coli and Klebsiella pneumoniae and fungal strains viz Fusarium oxysporum and Aspergillus flavus. Further, the inhibition of biofilm formation of Pseudomonas aeruginosa was also carried out. The results showed that some of the synthesized compounds displayed significant antimicrobial activity against tested pathogens. Compounds bearing 3,4,5-trimethoxy (5c) and 4-chloro (5j) substituents on phenyl ring of pyrazole showed the prominent activity against all strains except Lactobacillus species. Among the compounds screened for antibiofilm activity, compounds 5b-d recorded good antibiofilm potential with <50% biofilm formation at 100 μM of which 5b recorded MIC as low as 20 μM.

Published
2017

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