Kurosaki F, Chiba J, Oda Y, Hino A, Inouye M. 2-Aminopyridine as a Nucleobase Substitute for Adenine in DNA-like Architectures: Synthesis of Alkynyl
C-Nucleotides and Their Hybridization Characteristics.
J Org Chem 2020;
85:2666-2671. [PMID:
31875396 DOI:
10.1021/acs.joc.9b02750]
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Abstract
Halogenated 2-aminopyridine was attached to the acetylene terminal of ethynyl C-2-deoxy-β-d-ribofuranoside as a nucleobase substitute, and then, the C-nucleoside was incorporated into natural DNAs. The resulting chimeric DNA constructed double helical structures with the complementary chimeric DNA. In the duplex, 2-aminopyridine functioned as an adenine analogue that formed a base pair with a non-natural thymine isostere. Artificial homooligomers were also prepared only from the adenine-type C-nucleoside and proven to form completely artificial double helices with the corresponding artificial thymine-type homooligomers.
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