New nitrofurans amenable by isocyanide multicomponent chemistry are active against multidrug-resistant and poly-resistant Mycobacterium tuberculosis
摘要:
A set of structurally diverse N-amino delta-lactams decorated with a 5-nitro-2-furyl moiety was synthesized using isocyanide-based multicomponent chemistry and evaluated for antibacterial activity. Three compounds displayed a selective and potent (MIC 22-33 mu M) inhibition of M. tuberculosis H(37)Rv strain growth, while other Gram-positive (MRSA and E. faecium) or Gram-negative (E. coli, P. aeruginosa, A. baumannii, K. pneumoniae) pathogens were not affected. The compounds also displayed moderate low cytotoxicity, as demonstrated in cell line viability assays. Several multidrug-and poly-resistant patient-derived M. tuberculosis strains were found to be susceptible to treatment with these compounds. The three most potent compounds share a significant structural similarity which provides a basis for further scaffold-hopping analog design. (C) 2017 Elsevier Ltd. All rights reserved.
New nitrofurans amenable by isocyanide multicomponent chemistry are active against multidrug-resistant and poly-resistant Mycobacterium tuberculosis
摘要:
A set of structurally diverse N-amino delta-lactams decorated with a 5-nitro-2-furyl moiety was synthesized using isocyanide-based multicomponent chemistry and evaluated for antibacterial activity. Three compounds displayed a selective and potent (MIC 22-33 mu M) inhibition of M. tuberculosis H(37)Rv strain growth, while other Gram-positive (MRSA and E. faecium) or Gram-negative (E. coli, P. aeruginosa, A. baumannii, K. pneumoniae) pathogens were not affected. The compounds also displayed moderate low cytotoxicity, as demonstrated in cell line viability assays. Several multidrug-and poly-resistant patient-derived M. tuberculosis strains were found to be susceptible to treatment with these compounds. The three most potent compounds share a significant structural similarity which provides a basis for further scaffold-hopping analog design. (C) 2017 Elsevier Ltd. All rights reserved.
A method for the chemoselectivereduction of Ugi-type lactam amides at the lactam carbonyl functionality with boranecomplexes has been developed. The novel reduction products can be further manipulated synthetically to yield various novel N- and C-terminally active unnatural amino acid building blocks.
A four-center, three-component Ugi-type reaction of a variety of keto acids, Boc- or Cbz-protected hydrazine, and isocyanides offers a simple and high yielding access to cyclic products containing an N-aminolactam unit. The latter are shown to form consistently an intramolecular hydrogen bond leading to a p-turn-like secondary structure. The possibility of integrating such N-aminolactam units (without disruption of the folded structure) into pseudotripeptide fragments is demonstrated. (C) 2010 Elsevier Ltd. All rights reserved.
New nitrofurans amenable by isocyanide multicomponent chemistry are active against multidrug-resistant and poly-resistant Mycobacterium tuberculosis
A set of structurally diverse N-amino delta-lactams decorated with a 5-nitro-2-furyl moiety was synthesized using isocyanide-based multicomponent chemistry and evaluated for antibacterial activity. Three compounds displayed a selective and potent (MIC 22-33 mu M) inhibition of M. tuberculosis H(37)Rv strain growth, while other Gram-positive (MRSA and E. faecium) or Gram-negative (E. coli, P. aeruginosa, A. baumannii, K. pneumoniae) pathogens were not affected. The compounds also displayed moderate low cytotoxicity, as demonstrated in cell line viability assays. Several multidrug-and poly-resistant patient-derived M. tuberculosis strains were found to be susceptible to treatment with these compounds. The three most potent compounds share a significant structural similarity which provides a basis for further scaffold-hopping analog design. (C) 2017 Elsevier Ltd. All rights reserved.