title: Synthesis and biological evaluation of a C5-biphenyl thiolactomycin library.
abstract: Fifteen novel C5 analogues of thiolactomycin (13 biphenyl analogues and two biphenyl mimics) have been synthesised and assessed for their in vitro mtFabH and whole cell Mycobacterium bovis BCG activity, respectively. Analysis of the 15 compounds revealed that six possessed enhanced in vitro activity in a direct mtFabH assay. Encouragingly analogues 11, 12 and 13 gave a significant enhancement in in vitro activity against mtFabH. Analogue 13 (5-(4-methoxycarbonyl-biphenyl-4-ylmethyl)-4-hydroxy-3,5-dimethyl-5H-thiophen-2-one) gave an IC(50) value of 3 microM compared to the parent drug thiolactomycin (75 microM) against mtFabH. The biological analysis of this library reaffirms the requirement for a linear pi-rich system containing hydrogen bond accepting substituents attached to the para-position of the C5 biphenyl analogue to generate compounds with enhanced activity.
authors.affiliation: School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.
authors.forename: Veemal
authors.initials: V
authors.lastname: Bhowruth
authors.forename: Alistair K
authors.initials: AK
authors.lastname: Brown
authors.forename: Suzanne J
authors.initials: SJ
authors.lastname: Senior
authors.forename: John S
authors.initials: JS
authors.lastname: Snaith
authors.forename: Gurdyal S
authors.initials: GS
authors.lastname: Besra
mesh_terms: D040761:Biomimetic Materials / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D016208:Databases, Factual; D020128:Inhibitory Concentration 50; D015394:Molecular Structure; D009161:Mycobacterium / Q000187:drug effects; D013329:Structure-Activity Relationship; D013876:Thiophenes / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology
chemical_list: D013876:Thiophenes; C035068:thiolactomycin