• Natural Product Sciences
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• 제11권3호
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• pp.136-138
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• 2005

Bioassay-guided fractionation of an organic extract of the broth from the marine-derived fungus of the genus Aspergillus led to the isolation of the polyketides, (+)-epoxydon (1), (+)-epoxydon monoacetate (2), gentisyl alcohol (3), 3-chlorogentisyl alcohol (4), and methylhydroquinone (5). Compounds 1-5 showed a potent antibacterial activity against the methicillin-resistant and multidrug-resistant Staphylococcus aureus (MRSA and MDRSA) with MIC (minimum inhibitory concentration) values of 12.5, 12.5, 12.5, 50.0, and $6.2\;{\mu}g/mL$, respectively. Compounds 1-4 also exhibited a significant radical scavenging activity against 1,1-diphenyl-2-picrylhydrazyl (DPPH) with $IC_{50}$ values of 6.0, 15.0, 7.0, and $1.0\;{\mu}M$, respectively.

• 대한화학회지
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• 제58권4호
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• pp.366-376
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• 2014

Synthesis, structural characterization, and biological activity studies of novel pyrido[2,3-d]pyrimidines (10a-h, 11a-h) are described. Cyclization of cynoacetamides (4, 5) with malonitrile (7) and aldehyde (6a-h) via Hantzsch pyridine synthesis afforded cyanopyridones (8a-h, 9a-h), which on cyclization with formic acid under microwave conditions led to the final product. All the reactions are significantly faster and the isolated yields are remarkably higher in microwave conditions compared to the conventionally heated reactions. The compounds were tested in vitro for their antibacterial activity against Escherichia coli, Pseudomonas aeruginosa, Bacillus subtillus, Staphylococcus aureus, and Micrococcus luteus and antifungal activity against Trichphyton longifusus, Candida albicans, Microsporum canis, Fusarium solani. Compounds 10b, 10e, 11b and 11e exhibited good antibacterial and antifungal activities compared with standards.

• 한국환경보건학회지
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• 제23권1호
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• pp.62-65
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• 1997

The insecticidal and antibacterial activity of new synthesized carbamate derivatives(5,7-dibromo-8-hydroxyquinolinyl-N-methylcarbamate(I), 5,7-dibromo-8-hydroxyquinolinyl-N-ethylcarbamate(II)) was examined using 0.2w/v% acetone solutions and 50 $\mu$g/ml-1000 $\mu$g/ml N,N'-dimethylformamide H$_2$O(2:3) solutions of each compounds, respectively. 1. Two carbamates exerted insectiddal effects on Sogata furcifera HORVATH, Delphacodes Striatella FAUEN and Nilaparvate lugens STAL, Whereas no significant effects were observed on the Inazuma dorasalis MOISCHIULSKY Nephateffix apicalis Cincticeps UHLER. 2. These compounds exhibited growth-inhibitory activity against Staphyloccus aureus, Salmonella paratyphi A, Shigella dysenteriae 1a, Escherichia coli NL 1401, at the concentration range of 100-500 $\mu$g/ml in general.

• 한국환경보건학회지
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• 제21권1호
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• pp.74-77
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• 1995

The insecticidal and antibacterial activity of new synthesized carbamate derivatives(8-Hydroxy-5-chloroquinolyl-N-methylcarbamate(I), 8-Hydroxy-5-chloroquinolyl-N-ethylcarbamate(II)) was examined using 0.2 w/v% acetone solutiolas and 50 r/ml~1000 r/m N,N'-dimethylformamide-$H_2O$(2:3) solutions of each compounds, respectively. 1) Two carbamates exerted insecticidal effects on Sogata furcifera HORVATH, Delphacodes Striatella FAUEN, Whereas no significant effects were observed on the Nilaparvate lugens STAL, Inazuma dorasails MOISCHIULSKY and Nephateffix apicalis Cincticeps UHLER. 2) These compounds exhibited growth-inhibitory activity against Staphylococcus aureus, Salmonella paratyphi A, Shigella dysenteriae 1a, Escherichia coli NL 1401,at the concentration range of 100~500 r/ml in general.

• 대한화학회지
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• 제54권6호
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• pp.731-736
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• 2010

5-Aryl-3-($\beta$-D-glucopyranosylthio)-1,2,4-triazole 화합물들을 합성하였으며, 합성한 화합물들에 대한 항균활성시험을 수행하였다.

• 대한화학회지
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• 제38권8호
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• pp.603-607
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• 1994

새로운 cephalosporin 항생물질인 7-[(3,4-dihydro-6-methoxycarbonyl-2,2-dimethyl-2H-1,4-thiazin-3-yl)acetamido]-3-[(substituted pyrimidin-2-yl)thiomethyl]-3-cephem-4-carboxylic acid derivatives(2a∼2d)유도체들을 합성하였다. 7-ACA의 3-위치에는 pyridinylthiomethyl기를 도입시키고, 7-위치에는 thiazine를 치환시켜서 구조 변화에 대한 항균 활성을 측정하였다. 그 결과 이들 유도체들은 기준물질인 cefotaxim보다 낮은 항균력을 나타내었다.

• Archives of Pharmacal Research
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• 제28권11호
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• pp.1228-1232
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• 2005

Four compounds, including two novel macrolides, were isolated from an endophyte Streptomyces sp. Is9131 of Maytenus hookeri. Spectral data indicated that these compounds were dimeric dinactin (1), dimeric nonactin (2), cyclo-homononactic acid (3), and cyclo-nonactic acid (4). Bioassay results showed that dimeric dinactin had strong antineoplastic activity and antibacterial activity.

• 대한화학회지
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• 제47권2호
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• pp.133-136
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• 2003

일련의 옥사졸론 유도체들을 (4a-n) 항균제로서 합성하였다. 이 화합물들은 아릴옥시아세틸아미노아세트산을 에탄올, 아세트산 무수물, 아세트산 소듐 존재하에 알데하이드와 반응시켜 합성하였으며 핵자기공명 스펙트럼과 적외선 스펙트럼으로 구조를 확인하였다.

• 대한화학회지
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• 제55권6호
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• pp.969-973
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• 2011

The synthesis, as well as spectroscopic and biological studies of a novel class of [3-(4-substitutedphenylamino)-8-azabicyclo [3.2.1] oct-8yl]-phenyl-methanone derivatives are described. All the synthesized compounds were characterized by elemental analysis FTIR, $^1H$-NMR, $^{13}C$ NMR, and Mass spectral data. All the synthesized compounds were exhibit in vitro antibacterial activity.

• 대한화학회지
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• 제57권2호
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• pp.241-245
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• 2013

A series of novel quinoline-6-carboxamides and 2-chloroquinoline-4-carboxamides were synthesized by the reaction of their analogous carboxylic acids with various amine derivatives in the presence of base TEA and protecting agent BOP at room temperature. Synthesized compounds were confirmed by spectral characterization viz IR, $^1H$-NMR, and MS. Antibacterial activity carried out against Escherichia coli and Staphyllococcus aureus indicated that the synthesized compounds were active against these microorganisms.