作者:Stefanie Arndt、Hans-Achim Wagenknecht
DOI:10.1002/anie.201407874
日期:2014.12.22
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.
合成了一个新的DNA结构单元,该结构单元带有通过氨基丙炔基与2'-脱氧尿苷的5位连接的推挽式取代的二芳基四唑。经过相应修饰的寡核苷酸可在365 nm(LED)照射下用马来酰亚胺修饰的磺基Cy3染料,N-甲基马来酰亚胺和甲基丙烯酸甲酯作为双极性亲和剂进行合成后标记。相对于其他无铜生物正交反应,确定的(23±7)M -1 s -1的速率常数 非常高,与叠氮化物和乙炔之间的铜催化环加成反应相当。