757189-87-0Relevant academic research and scientific papers
C8-Linked Pyrrolobenzodiazepine Monomers with Inverted Building Blocks Show Selective Activity against Multidrug Resistant Gram-Positive Bacteria
Andriollo, Paolo,Hind, Charlotte K.,Picconi, Pietro,Nahar, Kazi S.,Jamshidi, Shirin,Varsha, Amrit,Clifford, Melanie,Sutton, J. Mark,Rahman, Khondaker Miraz
, p. 158 - 174 (2018/02/14)
Antimicrobial resistance has become a major global concern. Development of novel antimicrobial agents for the treatment of infections caused by multidrug resistant (MDR) pathogens is an urgent priority. Pyrrolobenzodiazepines (PBDs) are a promising class of antibacterial agents initially discovered and isolated from natural sources. Recently, C8-linked PBD biaryl conjugates have been shown to be active against some MDR Gram-positive strains. To explore the role of building block orientations on antibacterial activity and obtain structure activity relationship (SAR) information, four novel structures were synthesized in which the building blocks of previously reported compounds were inverted, and their antibacterial activity was studied. The compounds showed minimum inhibitory concentrations (MICs) in the range of 0.125-32 μg/mL against MDR Gram-positive strains with a bactericidal mode of action. The results showed that a single inversion of amide bonds reduces the activity while the double inversion restores the activity against MDR pathogens. All inverted compounds did not stabilize DNA and lacked eukaryotic toxicity. The compounds inhibit DNA gyrase in vitro, and the most potent compound was equally active against both wild-Type and mutant DNA gyrase in a biochemical assay. The observed activity of the compounds against methicillin resistant S. aureus (MRSA) strains with equivalent gyrase mutations is consistent with gyrase inhibition being the mechanism of action in vivo, although this has not been definitively confirmed in whole cells. This conclusion is supported by a molecular modeling study showing interaction of the compounds with wild-Type and mutant gyrases. This study provides important SAR information about this new class of antibacterial agents.
An asymmetric C8/C8′-tripyrrole-linked sequence-selective pyrrolo[2,1-c][1,4]benzodiazepine (PBD) dimer DNA interstrand cross-linking agent spanning 11 DNA base pairs
Tiberghien, Arnaud C.,Evans, David A.,Kiakos, Konstantinos,Martin, Christopher R.H.,Hartley, John A.,Thurston, David E.,Howard, Philip W.
, p. 2073 - 2077 (2008/12/21)
A novel sequence-selective extended PBD dimer 4 has been synthesized that binds with high affinity to an interstrand cross-linking site spanning 11 DNA base pairs. Despite its molecular weight (984.07) and length, the molecule has significant DNA interstrand cross-linking potency (～100-fold greater than the clinically used agent melphalan) and sub-micromolar cytotoxicity in a number of tumour cell lines, suggesting that it readily penetrates cellular and nuclear membranes to reach its DNA target.
C/8/C8' LINKED 5-OXO-1,2,3,11A-TETRAHYDRO-5H-PYRROLO`2,1-C!`1,4!BENZODIAZEPINE DIMERS WITH 1H-PYRROLE-DICARBOXYLIC ACID AMIDE LINKERS AND OLIGOMERIC ANALOGS THEROF AS WELL AS RELATED COMPOUNDS FOR THE TREATMENT OF PROLIFERATIVE DISEASES
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Page/Page column 54-55, (2010/02/14)
Compounds of formula (I): PBD-A-Y-X- (Het)na-L- (Het)nb-L- (Het)nc-T- (Het')nd-L- (Het')ne-L- (Het')nf-X' -Y' -A' -PBD' and salts, solvates and chemically protected forms thereof, are disclosed wherein the PBD units have the formulae (PBD) (PBD') with the bonds at the 8 position on each molecule bond to the A and A' groups respectively ; A is selected from O, S, NH or a single bond , and each Het and Het' is respectively an amino-heteroarylene-carbonyl group ; X and X' are both either NH or C (=O) -Q-C (=O) - wherein Q is a divalent group such that HY = R ; in a second aspectm the invention comprises compounds of the general formula (II) : PBD-A-Y-X-(Het)ng-[L-(Het)nh] nj-X' -Y' -A' -PBD'. Wherein : PBD and PBD' are as defined above, X and X' are either NH and C(=O) respectively or C(O) and NH respectively ; the other substituents are defined in the claims. Further aspects of the present invention relate to their use in the manufacture of a medicament for the treatment of a proliferative disease.
Synthesis and DNA binding affinity of novel A-C8/C-C2-exo unsaturated alkoxyamido-linked pyrrolo[2,1-c][1,4]benzodiazepine dimers.
Kamal, Ahmed,Srinivas,Ramulu,Ramesh,Kumar, P Praveen,Kumar, M Shiva
, p. 4337 - 4350 (2007/10/03)
The synthesis of novel A-C8/C-C2-exo unsaturated alkoxyamido-linked pyrrolo[2,1-c][1,4]benzodiazepine dimers is reported and these dimers show significant DNA binding affinity and they also exhibit moderate anticancer activity.
