Synthesis and antimicrobial activity of novel 5-aminoimidazole-4-carboxamidrazones.

Abstract:

:A mild and simple method was developed to prepare a series of fifteen 5-aminoimidazole 4-carboxamidrazones, starting from the easily accessible 5-amino-4-cyanoformimidoyl imidazoles. The antimicrobial activity of these novel amidrazones was screened against Gram positive (Staphylococcus aureus) and Gram negative (Escherichia coli, Pseudomonas aeruginosa) bacteria and Candida sp. (Candida albicans, Candida krusei, Candida parapsilosis). Only a subset of compounds displayed fair-moderate activity against S. aureus and E. coli but all exhibited activity against Candida sp. The three most potent antifungal compounds were further tested against Cryptococcus neoformans, Aspergillus fumigatus and three dermatophytes (Trichophyton rubrum, Trichophyton mentagrophytes, Microsporum gypseum). These three hit compounds strongly inhibited C. krusei and C. neoformans growth, although their activity on filamentous fungi was very weak when compared to the activity on yeasts.

journal_name

Bioorg Med Chem Lett

authors

Ribeiro AI,Gabriel C,Cerqueira F,Maia M,Pinto E,Sousa JC,Medeiros R,Proença MF,Dias AM

doi

10.1016/j.bmcl.2014.08.025

subject

Has Abstract

pub_date

2014-10-01 00:00:00

pages

4699-4702

issue

19

eissn

0960-894X

issn

1464-3405

pii

S0960-894X(14)00856-7

journal_volume

24

pub_type

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