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Synthesis of 9-deazaguanine derivatives as potential inhibitors of tRNA-guanine transglycosylase (TGT)
 Chylíková, Barbora ; Hocek, Michal (advisor) ; Smrček, Stanislav (referee)
Shigellosis is an acute diarrheal disease caused by enterobacteria of the genus Shigella. Worldwide, these bacteria are responsible for about 1 million deaths out of 165 million cases of the disease yearly, of which children under the age of 5 from developing countries are the most vulnerable group. The enzyme tRNA-guanine transglycolase (TGT for short) has been identified as essential for the effective pathogenesis of Shigella bacteria and therefore becomes a potential target for the selective treatment of shigellosis. This bachelor thesis describes the optimization of the preparation of a key intermediate for the synthesis of potential TGT inhibitors based on 8-aryl-9-deazaguanine structure. The synthesis starts from commercially available 2,6-dichloro-9-deazapurine. The main steps of the synthesis are the hydrolysis at position 6, the nucleophilic aromatic substitution of the chlorine group for the amino group in position 2, further the iodation and the introduction of the 3-thienyl group in position 8 by Suzuki coupling.
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