National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Syntéza (purin-6-yl)acetátů a jejich transformace
Hasník, Zbyněk ; Hocek, Michal
A novel approach to the synthesis of (purin-6-yl)acetates was developed based on Pd-catalysed cross-coupling reactions of 6-chloropurines with the Reformatsky agent. These intermediates were converted into various products by functional group transformations. Amides were prepared by amidation of ester group with amines, 6-(hydroxyethyl)purines by reduction by NaBH4, and beta-substituted 6-ethylpurines by mesylation of 6-(hydroxyethyl)purines and subsequent nucleophilic substitution.
Purinové báze a nukleosidy nesoucí funkcionalizované C-substituenty v pozici 6. Syntéza a biologická aktivita
Hocek, Michal ; Šilhár, Peter ; Kuchař, Martin ; Hasník, Zbyněk ; Bambuch, Vítězslav
Purine bases and nucleosides bearing diverse functionalized C-substituents have been prepared either via cross-coupling reactions of 6-halopurines with protected functionalized organometallic reagents or via conjugate additions of nucleophiles to 6-vinyl- or 6-ethynylpurines. Other types of substituents have been prepared by further functional group transformations of 6-(mesyloxymethyl)purines. Systematic biological activity screening revealed several new types of cytostatic and anti-HCV purine nucleosides.

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