• Title/Summary/Keyword: naphthoquinone

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Synthesis of Anticoagulant 2-Chloro-3-(N-Arylamino)-1,4-Naphthoquinones (항응고성의 2-Chloro-3-(N-Arylamino)-1,4-Naphthoquinone 유도체 합성)

  • Ryu, Chung-Kyu
    • YAKHAK HOEJI
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    • v.32 no.4
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    • pp.245-250
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    • 1988
  • Naphthoquinone derivatives have been found to be anticoagulant. In this report, several new 2-chloro-3-(N-arylamino)-naphthoquinone derivatives were synthesized in oder to develope mild anticoagulant. 2, 3-dichloro-1, 4-naphthoquinone was reacted with p-aminobenzoic acid, m-aminobenzoic acid, toluidine, m-nitroaniline, sulfanilamide, sulfathiazole, sulfaguanidine, phenetidine, 2-aminopyrimidine and 3-amino-5-methylisoxazole in EtOH or AcOH afford 2-chloro-3-(p-carboxy anilino)-naphthoquinone (1), 2-chloro-3-(m-carboxyanilino)-naphthoquinone (2),2-chloro-3-(toluidino)-naphthoquinone (3),2-chloro-3-(m-nitroanilino)-naphthoquinone (4), 2-chloro-3-(4-sulfanilanilino)-naphthoquinone (5), 2-chloro-3-(4-sulfathiazolino)-naphthoquinone (6),2-chloro-3-(4-sulfaguanidino)-naphthoquinone (7),2-chlro-3-(phenetidino)-naphthoquinone (8), 2-chloro-3-(pyrimidine-2-amino)-naphthoquinone (9) and 2-chloro-3-(5-methylisoxazole-3-amino)-naphthoquinone (10) in good yield.

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Volatile Compounds from Root Shell of Juglans mandshurica (가래나무 뿌리껍질의 휘발성 화합물)

  • Kwon, Dong-Joo;Kim, Jin-Kyu;Bae, Young-Soo
    • Journal of Korean Society of Forest Science
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    • v.97 no.3
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    • pp.199-203
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    • 2008
  • By comparison of mass fragmentation pattern of each component with two modern MS libraries (NIST and Wiely 6), those were identified to one aliphatic alcohol (3-ethyl-2-methyl-1-pentene-3-ol) and three naphthoquinone derivatives (1,4-naphthoquinone, 5-hydroxy-1,4-naphthoquinone (juglone) and 5-hydroxy-2-methyl-1,4-naphthoquinone (plumbagin)). According to the quantitative study with authentic compounds of three naphthoquinone derivatives, 1,4-naphthoquinone and 5-hydroxy-1,4-naphthoquinone were the major volatile components in the root shell of Juglans mandshurica and their amounts were ca. $54.4{\mu}g/g$ and $21.3{\mu}g/g$, respectively.

Antibacterial Activities of Persimmon Roots-derived Materials and 1,4-Naphthoquinone's Derivatives against Intestinal Bacteria

  • Kim, Hyung-Wook;Lee, Chi-Hoon;Lee, Hoi-Seon
    • Food Science and Biotechnology
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    • v.18 no.3
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    • pp.755-760
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    • 2009
  • The growth-inhibiting activities of persimmon roots-derived materials against intestinal bacteria were evaluated and compared with that of 1,4-naphthoquinone as a positive control. The active constituent isolated from persimmon roots was characterized as 5-hydroxy-2-methyl-1,4-naphthoquinone using various spectroscopic analyses. Treatment with 1,4-naphthoquinone at a dose of 1.0 mg/disc strongly inhibited the growth of 6 intestinal bacteria. Furthermore, when the structure-activity relationships of 1,4-naphthoquinone's derivatives were evaluated, 5-hydroxy-2-methyl-1,4-naphthoquinone and 2-methyl-1,4-naphthoquinone were found to strongly inhibit the growth of Clostridium difficile, Clostridium perfringens, and Escherichia coli without adversely affecting the growth of Bifidobacterium adolescentis, Bifidobacterium longum, and Lactobacillus acidophilus. Additionally, 2-hydroxy-1,4-naphthoquinone and 5-hydroxy-1,4-naphthoquinone strongly inhibited the growth of C. difficile and C. perfringens, but did not inhibit the growth of E. coli. Taken together, these results indicate that persimmon roots-derived materials and some of 1,4-naphthoquinone's derivatives could be useful preventive agents against diseases caused by harmful intestinal bacteria.

Synthesis of -4,9-Dione Derivatives (벤조-[f]-인돌-4, 9-디온 유도체의 합성)

  • Lee, Ji-Young;Suh, Myung-Eun
    • YAKHAK HOEJI
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    • v.34 no.1
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    • pp.15-21
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    • 1990
  • -4,9-dione derivatives were prepared from $2-chloro-3-({\alpha}-accetyl-{\alpha}-ethoxycarbonyl-methyl)-1,4-naphthoquinone$ and 2-chloro-3-N-phenylamino-1,4-naphthoquinone. $2-Chloro-3-({\alpha}-acetyl-{\alpha}-ethoxycarbonyl-methyl)-1,4-naphthoquinone$ was reacted with amines to give $2-amino-3-({\alpha}-acetyl-{\alpha}-ethoxycarbonyl-methyl)-1,4-naphthoquinone$ derivatives. Subsequent treatment of $2-amino-3-({\alpha}-acetyl-{\alpha}-ethoxycarbonyl-methyl)-1,4-naphthoquinone$ with sodium ethoxide gave -4,9-dione derivatives. When 2-chloro-3-N-phenylamino-1,4-naphthoquinone reacted with sodium ${\alpha}-cyano$ ethyl acetate, 2-amino-3-ethoxycarbonyl-N-phenyl--4,9-dione was obtained. However, with sodium diethyl malonate, not -4,9-dione but 2-chloro-3-bis-(methoxycarbonyl)-methyl-2H-3-N-phenylamino-1,4-naphthoquinone was obtained.

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The effect of pretreated Lithospermum erythrorhizon derived-naphthoquinone on anxiety, depression in mice (지치 유래 naphthoquinone을 전처치한 생쥐에서 우울 및 불안 조절 효과)

  • Je, Hyun Dong;Min, Young Sil
    • Journal of Convergence for Information Technology
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    • v.10 no.7
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    • pp.116-121
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    • 2020
  • This study was undertaken to investigate the influence and related mechanisms that have yet to be clearly demonstrated of Lithospermum erythrorhizon derived-naphthoquinone (shikonin) on the anxiety, insomnia, depression in rats. We hypothesized that naphthoquinone, the primary ingredient of Lithospermum erythrorhizon, plays a role in the modulation of insomnia evoked by stress, depression evoked by forced swimming or anxiety evoked by elevated plus maze. Male ICR (Institute of Cancer Research) mice were used and the immobility or swimming time, the duration of sleep, the duration and entry frequency into open arms were measured and recorded. The administration of naphthoquinone (10, 30 and 100 mg/kg) potentiated barbiturate-induced sleep suggesting the activation of GABAA receptor. It also potentiated the time spent in open arms of the maze and decreased the immobility time in forced swimming. In conclusion, naphthoquinone has anxiolytic, hypnotic and anti-depressant properties and is a potential therapeutic for anxiety, insomnia and depression.

A Facile Preparation of Red Aminoquinones by Direct Irradiation of 1,4-BenzoQuinone and Naphthoquinones in Diethylamine

  • Kim, Sung Sik;Mah, Yoon Jung;Park, Sang Kyu
    • Journal of Photoscience
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    • v.11 no.32
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    • pp.61-63
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    • 2004
  • Some quinones such as 1,4-benzoquinone 2, 1,4-naphthoquinone 3 and 1,2-naphthoquinone 4 dissolved in diethylamine were irradiated with 300 nm UV light to afford red aminoquinones 6, 7, and 9 as the major products. Irradiation of a solution of a primary product, i.e., 2,5-bis(diethylamino)-1,4-benzoquinone 6 in benzene gave 2,5-bis (ethylamino)-1,4-benzoquinone 10 in 80% yield, along with an oxazoline 11 in 19% yield via photochemical deethylation. A solution of 2-diethylamino-1,4-naphthoquinone 7 in benzene was also irradiated under the same condition, in which 2-ethylamino-1,4-naphthoquinone 12 was obtained in ca. 100% yield.

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Screening of Phenolic Compounds with Inhibitory Activities against HMG-CoA Reductase (페놀 화합물로부터 HMG-CoA reductase 저해 활성 물질 탐색)

  • Son, Kun Ho;Lee, Ju Yeon;Lee, Jeong Soon;Kang, Sam Sik;Sohn, Ho Yong;Kwon, Chong Suk
    • Journal of Life Science
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    • v.27 no.3
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    • pp.325-333
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    • 2017
  • High level of plasma cholesterol is strongly associated with the development of atherosclerosis and coronary heart disease. Clinical trials designed to reduce plasma cholesterol level by diet or pharmacological intervention have resulted in marked reduction of disease incidence. The enzyme 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase which reduces cholesterol biosynthesis in the liver is the key enzyme of the mevalonate pathway that produces cholesterol. In this study, 71 naturally occurring phenolic compounds were tested for inhibitory activities against HMG-CoA reductase. Eleven compounds out of 71 showed inhibitory activities: three hydrolyzable tannin (geraniin, acetonyl geraniin and pentagalloyl ${\beta}-D-glucose$), four benzoic acid derivatives (benzoic acid, trans-cinnamic acid, 2,4-dihydroxybenzoic acid and 2,5-dihydroxybenzoic acid), and four naphthoquinone derivatives (1,2-naphthoquinone, 1,4-naphthoquinone, plumbagin and shikonin). At the concentration of $10{\mu}g/ml$, 1,4-naphthoquinone inhibited HMG-CoA reductase by 99.4%, and then plumbagin 91.4%, pentagalloyl ${\beta}-D-glucose$ 46.6%, 2,4-dihydroxybenzoic acid 40.9%, shikonin 37.7%, 1,2-naphthoquinone 36.6%, trans-cinnamic acid 32.0%, acetonyl geraniin 30.2%, benzoic acid 28.5%, geraniin 28.3% and 2,5-dihydroxybenzoic acid 22.3%, respectively. $IC_{50}$ values of 1,4-naphthoquinone and plumbagin was $2.1{\mu}g/ml$ and $5.8{\mu}g/ml$, respectively.

Isolation and Antimicrobial Activity of a Naphthoquinone from Impatiens balsamina (봉선화의 항균활성성분(抗菌活性成分)과 항균력(抗菌力)에 관(關)한 연구(硏究))

  • Kang, Soo-Chul;Moon, Young-Hee
    • Korean Journal of Pharmacognosy
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    • v.23 no.4
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    • pp.240-247
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    • 1992
  • Impatiens balsamina Linne(Balsaminaceae) known as 'BONG SUN HWA' in Korea and has been used for the treatment of scrofulosis, carbunculus and dysenteria etc. Bioassay-guided fractionation of MeOH extract from the whole plants of Impatiens balsamina has afforded a simple naphthoquinone derivative, 2-methoxy-1,4-naphthoquinone. The structure of this compound was established by spectroscopic methods. This compound possessed strong antifungal activity against Candida albicans, AspergiIlus niger, Crytococcus neoformans and Epidermophyton floccusum. The activity of 2-methoxy-1,4-naphthoquinone on E. floccusum $(MIC{\;}:{\;}5.0{\;}{\mu}g/ml)$ was the same potency as that of nystatin. It showed also strong antibacterial activity against gram-positive bacteria Bacillus subtilis as well as gram-negative bacteria Salmonella typhimurium. Although the activity of this compound on gram-negative bacteria was lower than that of gram-positive bacteria.

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Synthesis and Photocharacteristics of Polysiloxane substituted Naphthoquinone-1,2-diazide sulfonyl group (Naphthoquinone-1,2-Diazaide-Sulfonyl기 치환 Polysiloxane의 합성과 그 감광특성)

  • Kang, Doo-Whan;Chung, Nag-Jin
    • Applied Chemistry for Engineering
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    • v.2 no.4
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    • pp.348-355
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    • 1991
  • Polysiloxane copolymers were prepared by copolymerizing hexamethylcyclotrisiloxane with tetramethylcyclotetrasiloxane, and then reacted with allyamine. Copolymers containing naphthoquinone-1,2-diazide-5-sulfonyl group were synthesized by reacting naphthoquinone-1,2-diazide-5-sulfonyl chloride with siloxane copolymers having amino group. Thermal decomposition temperatures of copolymers were $360{\sim}450^{\circ}C$, and photosensitive characteristics were dependent on the molecular weights of backbone resins and sensitizers. Sensitivity of copolymers was $50{\sim}120mJ/cm^2$ and contrast(${\gamma}$) was 1.4~2.1.

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Studies on 1,2-Naphthoquinone-(2)diazide-5-sulfonic Acid Ester Derivatives for Pre-sensitized Offset Plates (PS 판용 1,2-Naphthoquinone-(2)diazide-5-sulfonic Acid Ester Derivatives의 합성 및 응용)

  • Ku, Yang Seo;Myung, Young Chan;Ahn, Chong Il;Kim, Sun Ho
    • Applied Chemistry for Engineering
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    • v.10 no.8
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    • pp.1169-1174
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    • 1999
  • 2-Diazo-1-naphthoquinone-5-sulfonyl chloride(NQD-Cl) was synthesized from sodium 2-diazo-naphthoquinone-5-sulfonate by chlorination. NQD-Cl was esterified with hydroxybenzophenones to give several 1,2-naphthoquinone-(2)-diazide-5-sulfonic acid ester derivatives(NQD-esters). We have compared benzophenone derivatives with methoxy group to benzophenone derivatives with hydroxy group. Solubility of each NQD-ester was studied. Each of NQD-esters was formulated with novolac base resin and PS plates were manufactured. Photosensitivity, bleachability, compatible exposed time and relative sensitivity were determined by UV spectrophotometry, imaged by UV lithographic techniques, and the gray scale method. According to the number of substituted NQD group, it showed that relative sensitivity was different from gray scale method. NQD-esters with methoxy group showed a good solubility and higher sensitivity than commercial PS ones.

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