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Synthesis of nucleoside analogs based on derivatives of 2-deoxy-2-fluoro- and 3-deoxy-3-fluoro-D-ribose and pyrazines
 Smolka, Ondřej ; Jindřich, Jindřich (advisor) ; Smrček, Stanislav (referee)
This thesis deals with the synthesis of prodrugs based on analogs of nucleoside phosphonates derived from 6-fluoro-3-hydroxypyrazine-2-carboxamide (T-705) and 3- hydroxypyrazine-2-carboxamide (T-1105). T-705 and T-1105 act as inhibitors of an influenza RNA polymerase. Both compounds mimic naturally occurring nucleobases, so their fluorinated nucleoside phosphonates could also be biologically active. Derivatives of 2-deoxy-2-fluoro-D-ribose (2-FdR) were prepared in this work. Because of complications during the syntthesis of 3-deoxy-3-fluoro-D-ribose (3-FdR) derivatives, 5- deoxy-5-fluoro-D-xylose (5-FdX) derivatives were prepared instead. Deoxyfluorination was done after incorporation of suitable protecting groups followed by selective deprotection and phosphonate binding. Furthermore nucleosides were synthetised using silyl-Hilbert-Johnson method and their bis-POM derivattives were also prepared. Key words: favipiravir (T-705), T-1105, prodrugs, phosphonates, fluorinated nucleosides
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