TAILIEUCHUNG - Prasad et al. Organic and Medicinal Chemistry Letters 2011, 1:4

Prasad et al. Organic and Medicinal Chemistry Letters 2011, 1:4 ORIGINAL Open Access Design, synthesis and antimicrobial evaluation of novel 2-aryl-thiazolidin-4-one derivatives Davinder Prasad1, Awanit Kumar2, Praveen Kumar Shukla2 and Mahendra Nath1* Abstract Novel 2-arylthiazolidin-4-one derivatives (8a-q and 11) have been synthesized in good-to-excellent yields (70-96%) by one-pot three-component condensation-cyclization reaction of aromatic or aliphatic primary amines, aromatic aldehydes, and thioglycolic acid in polypropylene glycol at 110°C temperature. The in vitro antimicrobial activity of the synthesized 2-arylthiazolidin-4-ones was investigated against a panel of six pathogenic fungal strains, a Grampositive and three Gram-negative bacteria. Results revealed that the compounds (8a-d) bearing 3-(4-(1Himidazolylmethyl)phenyl)-substituent displayed significant antibacterial. | Prasad et al. Organic and Medicinal Chemistry Letters 2011 1 4 http content 1 1 4 o Organic and Medicinal Chemistry Letters a SpringerOpen Journal ORIGINAL Open Access Design synthesis and antimicrobial evaluation of novel 2-aryl-thiazolidin-4-one derivatives Davinder Prasad1 Awanit Kumar2 Praveen Kumar Shukla2 and Mahendra Nath1 Abstract Novel 2-arylthiazolidin-4-one derivatives 8a-q and 11 have been synthesized in good-to-excellent yields 70-96 by one-pot three-component condensation-cyclization reaction of aromatic or aliphatic primary amines aromatic aldehydes and thioglycolic acid in polypropylene glycol at 110 C temperature. The in vitro antimicrobial activity of the synthesized 2-arylthiazolidin-4-ones was investigated against a panel of six pathogenic fungal strains a Grampositive and three Gram-negative bacteria. Results revealed that the compounds 8a-d bearing 3- 4- 1H-imidazolylmethyl phenyl -substituent displayed significant antibacterial efficacy specifically against Klebsiella pneumoniae minimum inhibitory concentration pg mL . In addition some of the synthesized compounds have also shown antimicotic activity against Sporothrix schenckii Trichophyton mentagrophytes and Aspergillus fumigatus at the concentration of 50 pg mL. Keywords 2-arylthiazolidinones antimicrobial activity 1 2 4-triazole imidazole morpholine Introduction The increasing cases of microbial resistance pose a major concern to the scientific community and have become a threat for human life worldwide. Moreover invasive microbial infections caused by multi-drug-resistant Grampositive bacteria and microbes are difficult to diagnose and treat 1 . They are the major cause of morbidity and mortality especially in immunosuppressed and hospital-acquired patients 2 . To overcome these problems the development of new and safe antimicrobial agents with better effectiveness is urgently required. To this end one of the best ways to design new antimicrobial agents is to

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