Krajczyk Anna, Zeidler Joanna, Januszczyk Piotr, Dawadi Surendra, Boshoff Helena I, Barry Clifton E, Ostrowski Tomasz, Aldrich Courtney C
Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznan, Poland.
Department of Medicinal Chemistry, University of Minnesota, Minneapolis, MN 55455, USA.
Bioorg Med Chem. 2016 Jul 15;24(14):3133-43. doi: 10.1016/j.bmc.2016.05.037. Epub 2016 May 20.
A series of 5'-O-[N-(salicyl)sulfamoyl]-2-aryl-8-aza-3-deazaadenosines were designed to block mycobactin biosynthesis in Mycobacterium tuberculosis (Mtb) through inhibition of the essential adenylating enzyme MbtA. The synthesis of the 2-aryl-8-aza-3-deazaadenosine nucleosides featured sequential copper-free palladium-catalyzed Sonogashira coupling of a precursor 4-cyano-5-iodo-1,2,3-triazolonucleoside with terminal alkynes and a Minakawa-Matsuda annulation reaction. These modified nucleosides were shown to inhibit MbtA with apparent Ki values ranging from 6.1 to 25nM and to inhibit Mtb growth under iron-deficient conditions with minimum inhibitory concentrations ranging from 12.5 to >50μM.
设计了一系列5'-O-[N-(水杨基)氨磺酰基]-2-芳基-8-氮杂-3-脱氮腺苷,旨在通过抑制必需的腺苷酸化酶MbtA来阻断结核分枝杆菌(Mtb)中的分枝杆菌素生物合成。2-芳基-8-氮杂-3-脱氮腺苷核苷的合成特点是前体4-氰基-5-碘-1,2,3-三唑核苷与末端炔烃进行无铜钯催化的Sonogashira偶联反应以及皆川-松田环化反应。这些修饰的核苷显示出对MbtA的抑制作用,其表观Ki值范围为6.1至25nM,并且在缺铁条件下抑制Mtb生长,最低抑菌浓度范围为12.5至>50μM。