• Title/Summary/Keyword: benzopyran

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Synthesis and Antibacterial Activity of New Tetrazole Derivatives (새로운 Tetrazole유도체의 합성과 항균활성)

  • Mulwad, V.V.;Pawar, Rupesh B;Chaskar, Atul C
    • Journal of the Korean Chemical Society
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    • v.52 no.3
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    • pp.249-256
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    • 2008
  • 3-Acetyl/Formyl 4-hydroxy-2H(1)-benzopyran-2-one on treatment with malonitrile and ethyl cyanoacetate yielded 1,1-dicyano-2-[4/-hydroxy-2/H(1)-benzopyran-2/-one-3/-yl] ethene/propene 2a-h and ethyl-2-cyano-3-[4/-hydroxy-2/H (1)-benzopyran-2/-one-3/-yl] propenoate/butenoate 3a-h respectively. The 1,3 dipolar reaction of 2a-h with NaN3 gave the tetrazole derivative 4a-h. 3a-h on cyclization with PPA gave 3-cyano-2H,5H-pyrano [3, 2-c] benzopyran-2,5-diones 5a-h which on 1,3 dipolar reaction with NaN3 to gave 3-(1/H-tetrazol-5/-yl)-2H,5H-pyrano[3, 2-c] benzopyran-2,5-diones 6a-h. The structures of the compounds have been established on the basis of the spectral and analytical data. All the compounds were screened for their antimicrobial activities and have been found to exhibited significant antibacterial activities. Compounds 2h and 4h showed the activity 50g/mL.

Solid-phase Parallel Synthesis of a Novel N-[Alkylsulfonamido-spiro(2H-1-benzopyran-2,4-piperidine)-6-yl] substituted Amide and Amine Drug-like Libraries

  • Kim, Ji-Hye;Gong, Young-Dae;Lee, Gee-Hyung;Seo, Jin-Soo
    • Bulletin of the Korean Chemical Society
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    • v.33 no.1
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    • pp.128-136
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    • 2012
  • We report the solid-phase library construction of 222 number of a novel N-[alkyl sulfonamido-spiro(2H-1-benzopyran-2,4-piperidine)-6-yl] substituted amide 1A and amine 1B derivatives. The polymer-bound N-[alkylsulfonamido-spiro(2H-1-benzopyran-2,4-piperidine)-6-yl] substituted amide 9 and amine 10 derivatives were obtained by first diversity generation with various acid chlorides and alkyl halides. Further reactions on the resins 9 and 10 with substituted sulfonyl chlorides produced the desired N-[alkylsulfonamido-spiro(2H-1-benzopyran-2,4-piperidine)-6-yl] substituted amide 1A and amine 1B analogues.

Anti-inflammatory and Neurotrophic 2H-1-Benzopyran Derivatives of Chaenomeles sinensis

  • Ha, Young Jun;Lee, Tae Hyun;Subedi, Lalita;Kim, Hye Ryeong;Moon, Gyuri;Kim, Sun Yeou;Kim, Chung Sub
    • Natural Product Sciences
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    • v.28 no.1
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    • pp.1-5
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    • 2022
  • Two 2H-1-benzopyran derivatives, methyl 8-hydroxy-2,2-dimethyl-2H-1-benzopyran-5-carboxylate (1) and methyl 8-hydroxy-2,2-dimethyl-2H-1-benzopyran-6-carboxylate (2), including a new compound (1) were isolated from the twigs of Chaenomeles sinensis. Their chemical structures were characterized based on analysis of NMR data including 1H and 13C, COSY, HSQC, and HMBC and HRMS data. The isolated compounds (1 and 2) were assessed for their anti-neuroinflammatory activity by measuring inhibition levels of nitric oxide (NO) production in lipopolysaccharide (LPS)-activated BV-2 cells and for their neurotrophic activity by the secretion of nerve growth factor (NGF) in C6 cells. Compounds 1 and 2 exhibited powerful anti-neuroinflammatory effects with IC50 values of 17.14 and 19.30 μM, respectively, without cell toxicity, and also showed moderate effects on the stimulation of NGF secretion levels with 113.15 ± 3.54 and 130.20 ± 8.03%, respectively. The biosynthetic pathway of 1 and 2 was proposed that they would be derived from a protocatechuic acid and an isoprenyl unit.

First Concise Synthesis of Biologically Interesting Nigrolineabenzopyran A, (±)-Blandachromene II, and (±)-Daurichromene D

  • Lee, Yong-Rok;Wang, Xue
    • Bulletin of the Korean Chemical Society
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    • v.28 no.11
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    • pp.2061-2064
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    • 2007
  • The first efficient synthesis of biologically interesting nigrolineabenzopyran A, blandachromene II, and daurichromene D with the benzopyran moiety has been accomplished using ethylenediamine diacetatecatalyzed reaction as a key step. The key step in these synthetic strategies involves the formation of benzopyran moiety via an electrocyclization reaction.

Properties and Activitiy Screening of Chromone Derivatives (크로몬 유도체의 물성 및 활성검색)

  • 김영로;이상현;김경순;정춘식;정재훈;김박광
    • YAKHAK HOEJI
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    • v.44 no.2
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    • pp.107-114
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    • 2000
  • We have synthesized 4-isonitroso-4H-1-benzopyran and 4-amino-2,3-dihydro -4H-1-benzopyran of chromone derivatives by using condensation method. Physico-chemical properties of these compounds were measured and analyzed by UV and HPLC method. The correlation coefficient of their methanol solutions by UV were 0.9992 and 0.9994, respectively. And oxime compound was resolved within 4 min and had a detection limit of 3 ng at S/N=3 by HPLC using a reversed phase column with three solvents(MeOH, $H_2O$, HAc). The amino compound was resolved within 4.5 min and had a detection limit of 10 ng at S/N=3 by HPLC under the same conditions. Anti-diabetic effect of chromone derivatives were investigated in the streptozotocin (STZ)-induced diabetic rats. Diabetes was induced in male Sprague-Dawley rats by injections of STZ (45 mg/kg, i.v). The investigation of the hair growth effect of isonitrosobenzopyran and 4-aminobenzopyran on the hair of black mouse (C57BL/6) was also carried out. The administraion of their ethanol solution to the black mouse (C57BU/6) through skin them promoted the growth of hair.

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Synthesis and Investigation of Mass Spectra of 3-(substituent)-benzopyran[3.2-c]-[1]-benzopyran-6,7-diones (3-치환-벤조피란[3,2-c]-[1]-벤조피란-6,7-다이온의 합성과 질량스펙트럼)

  • I. M. EI-Deen;H.K. Ibrahim
    • Journal of the Korean Chemical Society
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    • v.47 no.2
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    • pp.137-146
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    • 2003
  • 3-Hydroxybenzopyran[3,2-c]-[1]-benzopyran-6,7-diones (3) and 3-methoxycarbonylcoumarin (4) were prepared via condensation of 1 with resorcinol in the presence of sodium methoxide. The chemical behavior of 3 towards acetic anhydride, alkyl halides and diazonium chloride is described. The electron impact ionization mass spectra of compounds 4,5 and 6a,b show a weak molecular ion peak and a base peak of m/z 89, m/z 280. m/z 91 and m/z 120 resulting from a cleavage fragmentation respectively. The molecular ion of compounds 3, 6b, and 7a is a base peak of m/z 280, m/z 366 and m/z 488 respectively. Compound 7a give a characteristic fragmentation pattern with a two very stable fragmentation of m/z 383 and m/z 77.