Arndt S, Wagenknecht HA. "Photoclick" postsynthetic modification of DNA.
Angew Chem Int Ed Engl 2014;
53:14580-2. [PMID:
25359534 DOI:
10.1002/anie.201407874]
[Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 09/12/2014] [Indexed: 12/31/2022]
Abstract
A new DNA building block bearing a push-pull-substituted diaryltetrazole linked to the 5-position of 2'-deoxyuridine through an aminopropynyl group was synthesized. The accordingly modified oligonucleotide allows postsynthetic labeling with a maleimide-modified sulfo-Cy3 dye, N-methylmaleimide, and methylmethacrylate as dipolarophiles by irradiation at 365 nm (LED). The determined rate constant of (23±7) M(-1) s(-1) is remarkably high with respect to other copper-free bioorthogonal reactions and comparable with the copper-catalyzed cycloaddition between azides and acetylenes.
Collapse