12 research outputs found

    Nucleophilic substitution reactions of 1,4-naphthoquinone and biologic properties of novel S-, S,S-, N-, and N,S-substituted 1,4-naphthoquinone derivatives

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    A novel series of S-, S,S-, N- and N,S-substituted 1,4-naphthoquinone derivatives were synthesized and evaluated for their antibacterial and antifungal activity. Among the synthesized compounds especially 10a and 11b have been discovered as an antibacterial or antifungal agents, and 15f is the most effective compound against M. luteum as potent antifungal. The structures of the novel products were characterized by micro analysis, UV/Vis, H-1 NMR, C-13 NMR, and MS. The electrochemical properties of some of the novel 1,4-naphthoquinone derivatives were also investigated by cyclic voltammetry

    Synthesis of novel 1,4-naphthoquinone derivatives: antibacterial and antifungal agents

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    A novel series of substituted 1,4-naphthoquinone derivatives was synthesized and evaluated for antibacterial and antifungal activity. The structures of the novel products were characterized by spectroscopic methods. Among the tested compounds, 3a and 9 are the most effective compounds against M. luteum as potent antibacterial and C. tenuis and A. niger as potent antifungal. These two compounds are promising as biologically active compounds

    Synthesis and biological evaluation of novel nitrogen- and sulfur-containing hetero-1,4-naphthoquinones as potent antifungal and antibacterial agents

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    1,4-Naphthoquinones are unique reagents in organic synthesis and have been employed in several well known and recently developed areas of application. Furthermore, these 1,4-naphthoquinones have demonstrated high reactivity in nucleophilic vinylic substitutions, in the preparation of sulfurated, (hetero)cyclic and several other transformations. This study describes the synthesis and biological evaluation of derivatives of monosulfurated naphthalene-1,4-dione (3), 3-chloro-2-ethoxy-naphthalene-1,4-dione (4), disulfurated naphthalene-1,4-dione (5), and symmetrical bis-1,4-naphthoquinones (7, 9) were obtained from the reaction of 2,3-dichloro-naphthaquinone (1) with S-, O-substituted mono-, di-, and tetrathiols, respectively. The structures of the novel products were characterized by spectroscopic methods. Crown Copyright (C) 2011 Published by Elsevier Masson SAS. All rights reserved

    Synthesis and Antibacterial and Antifungal Properties of Novel S-, N-, N,S-, and S,O-Substituted 1,4-Naphthoquinone Derivatives

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    A novel series of substituted 1,4-naphthoquinone derivatives were synthesized and evaluated for their antibacterial and antifungal activity. The structures of the novel products were characterized by spectroscopic methods. Among the tested compounds, 2,2,3,3-alkoxy substituted naphthoquinones, S,O-substituted naphthoquinone, and N,S-substituted naphthoquinone derivatives are the most potent antifungals against C. tenuis. 2,3-Thio-2,3-alkoxy substituted naphthoquinones are the most effective antifungal compounds against A. niger. Supplemental materials are available for this article. Go to the publisher's online edition ofPhosphorus, Sulfur, and Silicon and the Related Elementsto view the free supplemental file

    Synthesis, antibacterial and antifungal evaluation of thio- or piperazinyl-substituted 1,4-naphthoquinone derivatives

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    A series of S-, S,S-, S,O-, N- and N,S-derivatives from 2,3-dichloro-1,4-naphthoquinone compound 1 were synthesized in different reaction media and evaluated for their antibacterial and antifungal activities. The structures of the novel products were characterized by spectroscopic methods, such as microanalysis, H-1 NMR, C-13 NMR and MS. Among the tested compounds 9, 12 and 18 are the most effective compounds against Candida tenuis as potent antifungal compounds. Compound 9 is also the most effective compound against Staphylococcus aureus as a potent antifungal compound

    Synthesis and Antibacterial and Antifungal Properties of Novel S-, N-, N,S-

    No full text
    A novel series of substituted 1,4-naphthoquinone derivatives were synthesized and evaluated for their antibacterial and antifungal activity. The structures of the novel products were characterized by spectroscopic methods. Among the tested compounds, 2,2,3,3-alkoxy substituted naphthoquinones, S,O-substituted naphthoquinone, and N,S-substituted naphthoquinone derivatives are the most potent antifungals against C. tenuis. 2,3-Thio-2,3-alkoxy substituted naphthoquinones are the most effective antifungal compounds against A. niger. Supplemental materials are available for this article. Go to the publisher's online edition ofPhosphorus, Sulfur, and Silicon and the Related Elementsto view the free supplemental file
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