SENSITIVE OLIGONUCLEOTIDE SYNTHESIS USING SULFUR-BASED FUNCTIONS AS PROTECTING GROUPS AND LINKERS
申请人:Fang Shiyue
公开号:US20210032281A1
公开(公告)日:2021-02-04
Embodiments for the synthesis of sensitive oligonucleotides as well as insensitive oligonucleotides are provided. Sulfur-based groups are used for the protection of exo-amino groups of nucleobases, phosphate groups and 2′-OH groups, and as cleavable linker for linking oligonucleotides to a support. Oligonucleotide syntheses are achieved under typical conditions using phosphoramidite chemistry with important modifications. To prevent replacing sulfur-based protecting groups by acyl groups via cap-exchange, special capping agents are used. To retain hydrophobic tag to assist RP HPLC purification, special phosphoramidites are used in the last synthetic cycle. With the sulfur-based groups for protection and linking, oligonucleotide deprotection and cleavage are achieved via oxidation followed by beta-elimination under mild conditions. Therefore, besides for insensitive oligonucleotide synthesis, the embodiments of the invention are capable for the synthesis of oligonucleotide analogs containing sensitive functional groups that cannot survive the harsh conditions used in prior art oligonucleotide synthesis technologies.
expected similarity of the synthetic phenanthridinium moiety with noncovalently bound ethidium. More importantly, the results show clearly that the artificialphenanthridiniumbase is intercalated within the DNAbase stack. The counterbase as part of the complementary strand seems to have only a minor influence on the intercalation properties of the phenanthridinium moiety.
Amide group assisted 3′-dephosphorylation of oligonucleotides synthesized on universal A-supports
作者:Alex V Azhayev、Maxim L Antopolsky
DOI:10.1016/s0040-4020(01)00409-4
日期:2001.6
(±)-3-Amino-1-(4,4′-dimethoxytriphenylmethyl)-2-propanediol was attached to succinylated alkylamino-controlled pore glass via the second amide bond. The resulting solid phase was acylated to give seven new universal solid supports, compatible with the preparation of all common types of oligodeoxyribonucleotides. These resins allow for fast elimination of the 3′-terminal phosphodiester or phosphorothioate
作者:Yu. Yu. Agapkina、D. V. Agapkin、A. V. Zagorodnikov、Ya. I. Alekseev、G. A. Korshunova、M. B. Gottikh
DOI:10.1023/a:1019539707586
日期:——
duplex, a substrate of the HIV-1 integrase, in the presence of this enzyme resulted in the covalent DNA-protein complex. The oligonucleotides with the 1-(4-(3-(trifluoromethyl)-3H-diazirin-3-yl)benzamido)-2,3-propanediol moiety in their chains can be used for the photoaffinity modification of both nucleicacids and proteins that recognize them. The English version of the paper: Russian Journal of Bioorganic
Novel Cluster and Monomer-Based GalNAc Structures Induce Effective Uptake of siRNAs in Vitro and in Vivo
作者:Vivek K. Sharma、Maire F. Osborn、Matthew R. Hassler、Dimas Echeverria、Socheata Ly、Egor A. Ulashchik、Yury V. Martynenko-Makaev、Vadim V. Shmanai、Timofei S. Zatsepin、Anastasia Khvorova、Jonathan K. Watts
DOI:10.1021/acs.bioconjchem.8b00365
日期:2018.7.18
and four others using a GalNAc phosphoramidite monomer that was readily assembled into tri- or tetravalent designs during solid phase oligonucleotide synthesis. We compared these compounds to a clinically used trivalent GalNAc cluster both in vitro and in vivo. In vitro, cluster-based and phosphoramidite-based scaffolds show a similar rate of internalization in primary hepatocytes, with membrane binding