title: Synthesis of azidoaniline derivatives of oligonucleotides and investigation of their photochemical behavior.
abstract: A series of aryl azides, p-N3C6H4NH(CH2)nNH2 with n = 2-6, have been synthesized and used to prepare oligonucleotide derivatives carrying photoreactive the p-azidoaniline residue. Reactive moieties have been coupled to the 5'-terminal phosphate of d(pGATACCAA) [compounds IV(b), IV(c), and IV(e) with n = 3, 4, and 6, respectively] and of d(pGCC) [compound V(b) with n = 3] via a phosphoamide bond. Irradiation at wavelengths over > 300 nm of IV(b) and V(b) (n = 3) resulted in cleavage of the P-N bond. However, under the same reaction conditions, the P-N bond remained intact for compounds containing longer spacers [IV(c) and IV(e)]. Intraduplex reaction of the latter derivatives with d(GGTATCp)NH(CH2)6NH2 resulted in cross-linking dependent on the presence of an aliphatic amino group. The results obtained have demonstrated that the azidoaniline derivatives of oligonucleotides capable of the affinity modification of a specific target can be prepared. However, the sufficiently long aliphatic spacer group is necessary to prevent P-N bond cleavage within the photoreactive oligonucleotide.
authors.affiliation: Novosibirsk Institute of Bioorganic Chemistry, Siberian Division, Russian Academy of Sciences, Russia. Vova@modul.bioch.nsk.su
authors.forename: T S
authors.initials: TS
authors.lastname: Godovikova
authors.forename: V D
authors.initials: VD
authors.lastname: Knorre
authors.forename: G A
authors.initials: GA
authors.lastname: Maksakova
authors.forename: V N
authors.initials: VN
authors.lastname: Sil'nikov
mesh_terms: D000409:Alanine / Q000031:analogs & derivatives* / Q000737:chemistry / Q000528:radiation effects; D001386:Azides / Q000737:chemistry* / Q000528:radiation effects; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D002852:Chromatography, Ion Exchange; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D009153:Mutagens / Q000737:chemistry* / Q000528:radiation effects; D009841:Oligonucleotides / Q000737:chemistry* / Q000528:radiation effects; D010777:Photochemistry
chemical_list: D001386:Azides; D009153:Mutagens; D009841:Oligonucleotides; C039309:azidoalanine; D000409:Alanine