Nucleoside macrocycles formed by intramolecular click reaction: efficient cyclization of pyrimidine nucleosides decorated with 5 `-azido residues and 5-octadiynyl side chains
Autor(en): | Liu, Jiang Leonard, Peter Mueller, Sebastian L. Daniliuc, Constantin Seela, Frank |
Stichwörter: | 1,2,3-TRIAZOLE; 1,3-DIPOLAR CYCLOADDITION; AZIDE; Chemistry; Chemistry, Organic; CIRCULARIZATION; click cyclization; conformation; DNA; FUNCTIONALIZATION; LIGATION; macrocycles; nucleosides; OLIGONUCLEOTIDES; STABILITY; X-ray | Erscheinungsdatum: | 2018 | Herausgeber: | BEILSTEIN-INSTITUT | Journal: | BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY | Volumen: | 14 | Startseite: | 2404 | Seitenende: | 2410 | Zusammenfassung: | Copper(I)-promoted ``click'' cyclization in the presence of TBTA afforded nucleoside macrocycles in very high yields (approximate to 70%) without using protecting groups. To this end, dU and dC derivatives functionalized at the 5-position of the nucleobase with octadiynyl side chains and with azido groups at the 5'-position of the sugar moieties were synthesized. The macrocycles display freely accessible Watson-Crick recognition sites. The conformation of the 16-membered macrocycle was deduced from X-ray analysis and H-1, H-1-NMR coupling constants. The sugar conformation (N vs S) was different in solution as compared to the solid state. |
ISSN: | 18605397 | DOI: | 10.3762/bjoc.14.217 |
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geprüft am 01.06.2024