National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Přímá C-H arylace purinů a purinových nukleosidů
Čerňa, Igor ; Hocek, Michal
Direct C–H arylation of purines to position 8 by diverse aryl halides was achieved using Pd catalysis in the presence of CuI and Cs2CO3. The methodology was applied in consecutive regioselective synthesis of 2,6,8-trisubstituted purines bearing three different C-substituents in combination with two cross-coupling reaction. In addition, direct arylation of unprotected purine nucleosides with aryl iodides at position 8 was developed to allow straightforward single-step introduction of diverse aryl groups.
Příprava modifikovaných nukleosidů, nukleotidů a oligonukleotidů nesoucích komplexy kovů
Vrábel, Milan ; Hocek, Michal
Series of modified nucleosides and oligonucleotides bearing metal complexes were synthetized. Palladium catalyzed aqueous-phase cross-coupling reactions were used as key step in the synthesis of modified metallo-labeled nucleosides, nucleotides and oligonucleotides. The corresponding Fc modified dNTPs were good sustrates for DNA polymerases and were efficiently incorporated to DNA by primer extension (PEX). The modified nucleic acids are applicable as tools in bioanalysis.
DNA značená aminofenylem a nitrofenylem. Syntéza pomocí enzymatické inkorporace modifikovaných nukleosid trifosfátů, studium elektrochemických vlastností takto značené DNA
Cahová, Hana ; Havran, Luděk ; Horáková Brázdilová, Petra ; Pivoňková, Hana ; Fojta, Miroslav ; Hocek, Michal
We employed single step aqueous phase Suzuki-Miyaura cross-coupling reactions of halogenated 2'-deoxynucleoside 5'-triphosphates with 3-aminophenyl and 3-nitrophenylboronic acid for synthesis of modified nucleoside triphosphates (dNTPs). These dNTPs were then enzymatically incorporated into DNA in Primer extension experiment (PEX). Electrochemical detection using square-wave voltammetry of single-strand modified oligonucleotides (ONs) bearing 3-aminophenyl and 3-nitrophenyl tag demonstated excellent utilization in labeling of DNA.

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