Pentafluorophenyl Esters: Highly Chemoselective Ketyl Precursors for the Synthesis of α,α-Dideuterio Alcohols Using SmI<sub>2</sub> and D<sub>2</sub>O as a Deuterium Source
作者:Hengzhao Li、Yuxia Hou、Chengwei Liu、Zemin Lai、Lei Ning、Roman Szostak、Michal Szostak、Jie An
DOI:10.1021/acs.orglett.9b04383
日期:2020.2.21
We report the first highly chemoselective synthesis of α,α-dideuterio alcohols with exquisite incorporation of deuterium (>98% [D2]) using pentafluorophenyl esters as ketyl radical precursors, SmI2 as a mild reducing agent, and D2O as the deuterium source. This system tolerates a variety of functional groups, offering rapid entry to valuable α,α-dideuterated alcohol building blocks. More generally
Fatty acid conjugation enhances potency of antisense oligonucleotides in muscle
作者:Thazha P Prakash、Adam E Mullick、Richard G Lee、Jinghua Yu、Steve T Yeh、Audrey Low、Alfred E Chappell、Michael E Østergaard、Sue Murray、Hans J Gaus、Eric E Swayze、Punit P Seth
DOI:10.1093/nar/gkz354
日期:2019.7.9
structurally diverse saturated and unsaturated fattyacidconjugated ASOs with a range of hydrophobicity. The binding affinity of ASO fattyacidconjugates to plasma proteins improved with fattyacid chain length and highest binding affinity was observed with ASO conjugates containing fattyacid chain length from 16 to 22 carbons. The degree of unsaturation or conformation of double bond appears to have
The synthesis and associated structure–activity relationships for gene transfection of a series of spermine-derived cationic gemini surfactants incorporating diamino acid headgroups and either identical (symmetrical) or different (unsymmetrical) lipophilic tailgroups is described. Transfection activity is found to depend critically upon the structural elements present.
Oligonucleotides Containing 1-Aminomethyl or 1-Mercaptomethyl-2-deoxy-<scp>d</scp>-ribofuranoses: Synthesis, Purification, Characterization, and Conjugation with Fluorophores and Lipids
作者:Virginia Martín-Nieves、Carme Fàbrega、Marc Guasch、Susana Fernández、Yogesh S. Sanghvi、Miguel Ferrero、Ramon Eritja
DOI:10.1021/acs.bioconjchem.0c00717
日期:2021.2.17
Oligonucleotide conjugates are widely used as therapeutic drugs, gene analysis, and diagnostic tools. A critical step in the biologically relevant oligonucleotide conjugates is the design and synthesis of functional molecules that connect oligonucleotide with ligands. Here, we report the synthesis and application for oligonucleotidefunctionalization of novel tethers based on aminomethyl and mercaptomethyl