A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä

3-Acetyloxy-2-cyano-2-(alkylaminocarbamoyl)propyl Groups as Biodegradable Protecting Groups of Nucleoside 5 '-mono-Phosphates




TekijätOra M, Mantyvaara A, Lonnberg H

KustantajaMDPI AG

Julkaisuvuosi2011

JournalMolecules

Tietokannassa oleva lehden nimiMOLECULES

Lehden akronyymiMOLECULES

Numero sarjassa1

Vuosikerta16

Numero1

Aloitussivu552

Lopetussivu566

Sivujen määrä15

ISSN1420-3049

DOIhttps://doi.org/10.3390/molecules16010552

Rinnakkaistallenteen osoitehttps://research.utu.fi/converis/portal/Publication/2045232


Tiivistelmä
Thymidine 5`-bis[3-acetyloxy-2-cyano-2-(2-phenylethylcarbamoyl)propyl] phosphate (1) has been prepared and the removal of phosphate protecting groups by hog liver carboxyesterase (HLE) at pH 7.5 and 37 degrees C has been followed by HPLC. The first detectable intermediates are the (R(P))- and (S(P))-diastereomers of the monodeacetylated triester 14, which subsequently undergo concurrent retro-aldol condensation to diester 4 and enzyme-catalyzed hydrolysis to the fully deacetylated triester 15. The former pathway predominates, representing 90% of the overall breakdown of 14. The diester 4 undergoes the enzymatic deacetylation 700 times less readily than the triester, but gives finally thymidine 5`-monophosphate as the desired main product. To elucidate the potential toxicity of the electrophilic 2-cyano-N-(2-phenylethyl) acrylamideby-product 17 released upon the deprotection, the hydrolysis of 1 has also been studied in the presence of glutathione (GSH).


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