| Literature DB >> 4000969 |
R W Adamiak, E Biała, B Skalski.
Abstract
Fluorescent N-/purin-6-yl/pyridinium salts are formed in pyridine assisted phosphorylations and arenesulphonations of the hypoxanthine lactam system under various conditions including those used in oligonucleotide synthesis. The N1-methyl-N3-/purin-6-yl/imidazolium salt is generated in phosphorylation with TPSCl/1-methylimidazole as a coupling system. Both salts are representatives of a new family of ionic side-products in oligonucleotide synthesis involving hypoxanthine residues. Their isolation procedure has been developed. High reactivity of N-/purin-6-yl/pyridinium salts towards some reagents used in oligonucleotide chemistry, e.g. pyridinium mediated conversion of hypoxanthine into 6-aminopurine, can result in point mutations in synthesized oligomer.Entities:
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Year: 1985 PMID: 4000969 PMCID: PMC341209 DOI: 10.1093/nar/13.8.2989
Source DB: PubMed Journal: Nucleic Acids Res ISSN: 0305-1048 Impact factor: 16.971