A process of manufacturing protected nucleosides comprises reacting a nucleoside with a protecting reagent in the presence of a regioselective activator to produce a regioselectively protected nucleoside. In some embodiments of the inventive method, an optionally substituted trityl or optionally substituted pixyl group is selectively added to the 5′-O-position of a nucleoside in the presence of lutidine as activator or activator/solvent. The inventive method results in improved selectivity of the 5′-O-position over the 3′-O-position, thereby improving overall product yield and purity, and permitting simplified purification protocols, in some cases obviating the need for chromatography to produce a purified protected nucleoside suitable for automated synthesis of oligonucleotides, such as primers, probes and antisense molecules.
Cobalamin mediated delivery of nucleic acids, analogs and derivatives thereof
申请人:Collins A. Douglas
公开号:US20060074034A1
公开(公告)日:2006-04-06
This invention is in the area of cobalamin-mediated delivery of nucleic acids and analogs and derivatives thereof to a host to affect gene expression.
这项发明涉及钴胺素介导的核酸及其类似物和衍生物的传递到宿主以影响基因表达。
AMINOOXY-MODIFIED NUCLEOSIDIC COMPOUNDS AND OLIGOMERIC COMPOUNDS PREPARED THEREFROM
申请人:——
公开号:US20030088079A1
公开(公告)日:2003-05-08
Nucleosidic monomers and oligomeric compounds prepared therefrom are provided which have increased nuclease resistance, substituent groups (such as 2′-aminooxy groups) for increasing binding affinity to complementary strand, and regions of 2′-deoxy-erythro-pentofuranosyl nucleotides that activate RNase H. Such oligomeric compounds are useful for diagnostics and other research purposes, for modulating the expression of a protein in organisms, and for the diagnosis, detection and treatment of other conditions susceptible to oligonucleotide therapeutics.
SERPINA1 IRNA COMPOSITIONS AND METHODS OF USE THEREOF
申请人:Alnylam Pharmaceuticals, Inc.
公开号:EP3412774A1
公开(公告)日:2018-12-12
The invention relates to RNAi agents, e.g., double-stranded RNAi agents, targeting the Serpina1 gene, and methods of using such RNAi agents to inhibit expression of Serpina1 and methods of treating subjects having a Serpina1 associated disease, such as a liver disorder.
COMPLEMENT COMPONENT C5 iRNA COMPOSITIONS AND METHODS OF USE THEREOF
申请人:Alnylam Pharmaceuticals, Inc.
公开号:US20150247143A1
公开(公告)日:2015-09-03
The invention relates to iRNA, e.g., double-stranded ribonucleic acid (dsRNA), compositions targeting the complement component C5 gene, and methods of using such iRNA, e.g., dsRNA, compositions to inhibit expression of C5 and to treat subjects having a complement component C5-associated disease, e.g., paroxysmal nocturnal hemoglobinuria.