Synthesis and Antimicrobial Activity of Glycosylated 2-Aryl‑5‑amidinobenzimidazoles
摘要:
A series of new glycosylated 2-aryl-5-amidinobenzimidazoles derived from four different carbohydrates (D-glucose, D-galactose, N-acetyl-D-glucosamine and lactose) were synthesized by the condensation of the appropriate 4-formy1-3-methoxyphenyl glycoside with 4-amidino- or 4-N-isopropylamidino-ortho-phenylenediamine hydrochloride. All the compounds were properly characterized by high resolution mass spectrometry. uni- and bidimensional H-1 and C-13 nuclear magnetic resonance and then were evaluated for their antibacterial and antifungal potential. Considering the antifungal potential of them, two derivatives were active against Candida parapsilosis at 96.4 mu mol L-1 and another was active against this same strain at 83.5 mu mol L-1. In addition, one benzamidine showed activity against Candida glabrata at 97 mu mol L--(1). Considering the antibacterial potential of these compounds. six of them showed better activity against three different stains: three of them with IC50 of 96.4, 97 and 83.5 mu mol L-1 against Gram-positive Micrococcus luteus, the other two with IC50 96.5 and 96.4 mu mol L-1 against Gram-positive Enterococcus faecalis and one against Gram-negative Escherichia coli at 90.5 mu mol L-1. These findings suggest this structural pattern can be employed for design of more potent agents for discovery of new antimicrobial drug candidates.
Glycosylation of various phenols with alpha -D-glucosaminyl chloride peracetate in a solid phase-liquid system catalyzed by crown compounds was studied. The highest yields of aryl beta -glycosides were observed at room temperature in acetonitrile using anhydrous potassium carbonate as a base. The optimum phenol-glycosyl donor-base-crown ether ratio was 1 : 1 : 1 : 0.2.
作者:V. O. Kur'yanov、T. A. Chupakhina、A. E. Zemlyakov、S. A. Kotlyar、G. L. Kamalov、V. Ya. Chirva
DOI:10.1023/a:1012988719296
日期:——
Glycosylation of various phenols with alpha -D-glucosaminyl chloride peracetate in a solid phase-liquid system catalyzed by crown compounds was studied. The highest yields of aryl beta -glycosides were observed at room temperature in acetonitrile using anhydrous potassium carbonate as a base. The optimum phenol-glycosyl donor-base-crown ether ratio was 1 : 1 : 1 : 0.2.
Synthesis and Antimicrobial Activity of Glycosylated 2-Aryl‑5‑amidinobenzimidazoles
作者:Thiago de Souza、Josidel Oliver、Ana Paula Gomes、Cícero Flávio Aragão、Leandro Ferreira、Fernando Henrique Nogueira、Amanda Dias、Ricardo Alves
DOI:10.21577/0103-5053.20170227
日期:——
A series of new glycosylated 2-aryl-5-amidinobenzimidazoles derived from four different carbohydrates (D-glucose, D-galactose, N-acetyl-D-glucosamine and lactose) were synthesized by the condensation of the appropriate 4-formy1-3-methoxyphenyl glycoside with 4-amidino- or 4-N-isopropylamidino-ortho-phenylenediamine hydrochloride. All the compounds were properly characterized by high resolution mass spectrometry. uni- and bidimensional H-1 and C-13 nuclear magnetic resonance and then were evaluated for their antibacterial and antifungal potential. Considering the antifungal potential of them, two derivatives were active against Candida parapsilosis at 96.4 mu mol L-1 and another was active against this same strain at 83.5 mu mol L-1. In addition, one benzamidine showed activity against Candida glabrata at 97 mu mol L--(1). Considering the antibacterial potential of these compounds. six of them showed better activity against three different stains: three of them with IC50 of 96.4, 97 and 83.5 mu mol L-1 against Gram-positive Micrococcus luteus, the other two with IC50 96.5 and 96.4 mu mol L-1 against Gram-positive Enterococcus faecalis and one against Gram-negative Escherichia coli at 90.5 mu mol L-1. These findings suggest this structural pattern can be employed for design of more potent agents for discovery of new antimicrobial drug candidates.