摘要:
The present invention provides desazapurine-nucleoside derivatives of the general formula: wherein X is a nitrogen atom or a methine radical, W is a nitrogen atom or a C—R4 radical, R1, R2, R3 and R4, which can be the same or different, are hydrogen or halogen atoms, hydroxyl or mercapto groups, lower alkyl, lower alkylthio, lower alkoxy, aralkyl, aralkoxy or aryloxy radicals or amino groups optionally substituted once or twice, R5 is a hydrogen atom or a hydroxyl group, R6 and R7 are each hydrogen atoms or one of them is a halogen atom or a cyano or azido group or an amino group optionally substituted once or twice, whereby one of R6 and R7 can also be a hydroxyl group when X is a methine radical and, in addition, R5 and R7 can together also represent a further valency bond between C-2′ and C-3′ and Y is a hydrogen atom or a mono-, di- or tri-phosphate group.
摘要:
2′-Deoxyisoguanosine, isosteric analogues and isoguanosine derivatives of formulae I-V, processes for their production via compounds of the general formulae a or b and reaction with aroyl isocyanates or from compounds of the general formulae VI-IX by photochemical irradiation. A further production process is the conversion of deoxyguanosines or guanosines by means of persilylation, reaction with ammonia and deamination in the 2 position. The compounds are suitable as pharmaceutical agents with antiviral efficacy.
摘要:
The invention concerns pyrrolo-[3,2-d]pyrimidine, pyrazolo-[4,3-d]pyrimidine and pyrimidine-furanosides i.e. so-called C-nucleosides of the general formulae I-V or appropriate derivatives as well as processes for their production.
摘要:
The invention concerns compounds of the general formula (I) in which i:he residues R1 to R7 have the meanings given in the application as well as methods for their preparation. The compounds are in particular suitable as substrates for RNA or DNA polymerases and can thus be incorporated into RNA or DNA oligonucleotides and are especially suitable for labelling and detecting nucleic acids or for DNA sequencing.
摘要:
The invention concerns compounds of the general formula (I) in which the residues R1 to R7 have the meanings given in the application as well as methods for their preparation. The compounds are in particular suitable as substrates for RNA or DNA polymerases and can thus be incorporated into RNA or DNA oligonucleotides and are especially suitable for labelling and detecting nucleic acids or for DNA sequencing