1. 2'-O-[2-(amino)-2-oxoethyl] oligonucleotides
Thazha P Prakash, Andrew M Kawasaki, Elena A Lesnik, Stephen R Owens, Muthiah Manoharan Org Lett. 2003 Feb 20;5(4):403-6.doi: 10.1021/ol027131k.
[structure: see text] Oligonucleotides with novel modifications, 2'-O-[2-(amino)-2-oxoethyl] (2'-O-NAc), 2'-O-[2-(methylamino)-2-oxoethyl] (2'-O-NMAc), 2'-O-[2-(dimethylamino)-2-oxoethyl] (2'-O-DMAc), and 2'-O-[2-[[2-(dimethylamino)ethyl]amino]-2-oxoethyl] (2'-O-DMAEAc), have been synthesized. These modified oligonucleotides exhibit high binding affinity to complementary RNA (and not to DNA) and considerably enhance the nuclease stability of oligonucleotides with t(1/2) > 24 h.