Synthesis of the Fjord-region cis- and trans-Amino Triol Derivatives of the Carcinogenic Hydrocarbon Benzo[g]chrysene and Utilization for the Synthesis of a Deoxyadenosine Adduct Linked to the N6-Amino Group
摘要:
Efficient syntheses of the complete set of four diastereomeric fjord-region amino triol derivatives of benzo[g]chrysene in which the amino group in the 14-position and the adjacent 13-hydroxyl group are trans or cis to one another (trans- and cis-5 and 6) is described. This is the first description of the syntheses of the bay- or fjord-region cis-amino triol derivatives of any carcinogenic polycyclic aromatic hydrocarbon(PAH). The amino triols are key synthetic precursors of PAH-oligonucleotide adducts in which the PAH moiety is covalently linked to the exocyclic amino groups of deoxyadenosine or deoxyguanosine. Formation of adducts of this type via reaction of a PAH diol epoxide metabolite with DNA is believed to be a critical step in the mechanism of PAH carcinogenesis. The synthetic amino triol isomers may be used to synthesize PAH-oligonucleotides needed for site-directed mutagenesis studies to relate isomer structural differences to their effects on DNA replication.
A red-shifted two-photon-only caging group for three-dimensional photorelease
作者:Yvonne Becker、Erik Unger、Manuela A. H. Fichte、Daniel A. Gacek、Andreas Dreuw、Josef Wachtveitl、Peter J. Walla、Alexander Heckel
DOI:10.1039/c7sc05182d
日期:——
with higher two-photon action cross section and red-shifted absorption was developed. Due to calculations, a dimethylamino functionality (DMA) was added at ring position 7. The uncaging of nucleobases after two-photon excitation (2PE) could be visualized via double-strand displacement in a hydrogel. With this assay we achieved three-dimensional photorelease of DMA-NDBF-protected DNAorthogonal to NDBF-protected
Synthesis of oligodeoxynucleotides containing diastereomeric dihydrodiol epoxide-N6-deoxyadenosine adducts of polycyclic aromatic hydrocarbons
作者:Thomas Steinbrecher、Andreas Becker、John J. Stezowski、Franz Oesch、Albrecht Seidel
DOI:10.1016/s0040-4039(00)60775-x
日期:1993.3
A generally applicable route is reported for the synthesis of oligodeoxynucleotides which contain structurally defined N6-deoxyadenosine adducts, derived from sterically highly hindered dihydrodiol epoxides of polycyclic aromatic hydrocarbons (PAH).