Sulfurization Efficiency in the Solution Phase Synthesis of Deoxyribonucleoside Phosphorothioates - Comparison of Sulfur Triethylamine with Various Sulfurizing Agents1
摘要:
Efficient solution-phase synthesis of nucleoside phosphorothioates utilizing phosphoramidite approach is described. Elemental sulfur in combination with triethylamine is the prefered choice for sulfurization of phosphite triester to phosphorothioates.
Universal building blocks and support media for synthesis of oligonucleotides and their analogs
申请人:——
公开号:US20040152905A1
公开(公告)日:2004-08-05
Compounds for the synthesis of oligomeric compounds, particularly oligonucleotides and chemically modified oligonucleotide analogs, are provided. In addition, methods for functionalization of a support medium with a first monomeric subunit and methods for the synthesis of oligomeric compounds utilizing the novel compounds bound to support media are provided.
Labeled oligonucleotides, methods for making same, and compounds useful therefor
申请人:——
公开号:US20030208061A1
公开(公告)日:2003-11-06
Selectively functionalized oligonucleotides, methods for making same, and compounds useful therefor are disclosed. The oligonucleotides can be selectively functionalized with a first conjugate group at the 3′-terminial position and optionally functionalized with a second conjugate group at the 5′-terminal position and/or one or more internucleotides. Alternatively, the oligonucleotides can be selectively functionalized with a first conjugate group at the 5′-terminal position and optionally functionalized with a second conjugate group at one or more internucleotides. In yet another embodiment, the oligonucleotides can be functionalized with a first conjugate group at one or more internucleotides and with a second conjugate group at one or more different internucleotides.
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.
PROTECTED MONOMER AND METHOD OF FINAL DEPROTECTION FOR RNA SYNTHESIS
申请人:Dellinger Douglas J.
公开号:US20100076183A1
公开(公告)日:2010-03-25
A nucleoside monomer that is protected by a thionocarbamate protecting group is provided, as well as a method for making a polynucleotide that uses the same. Also provided is a polynucleotide synthesis method that employs a diamine to deprotect a protected polynucleotide.
作者:Jean Sala-Pala、Jean-Louis Migot、Jacques E. Guerchais、Luc Le Gall、François Grosjean
DOI:10.1016/s0022-328x(00)98711-4
日期:1983.6
(RO)2P(S)SSP(S)(OR)2 (IIa: R = Et; IIb: R = i-Pr) and R2NC(S)SSC(S)NR2 (IIIa: R = Me; IIIb: R = Et) to give niobium complexes via SS bond cleavage of the organic substrates. With IIa and IIb, the paramagnetic niobium complexes [Nb(η5-C5H5)2PS2(OR)2}2] (IV) are obtained, while IIIa and IIIb give diamagnetic niobium(V) derivatives. EPR spectra of complexes IV have been recorded at 130 and 295 K and are analysed
[Nb的(η 5 -C 5 H ^ 5)2(CH 3)2 ](I)反应与(RO)2 P(S)SSP(S)(OR)2(IIA:R =的Et; IIB: R = i-Pr)和R 2 NC(S)SSC(S)NR 2(IIIa:R = Me; IIIb:R = Et),通过有机底物的SS键裂解得到铌配合物。与IIa和IIb,所述顺磁性铌配合物[Nb的(η 5 -C 5 H ^ 5)2 PS 2(OR)2 } 2得到[IV],而IIIa和IIIb得到抗磁性的铌(V)衍生物。配合物IV的EPR光谱已在130和295 K处记录,并进行了详细分析。给出了自旋哈密顿量参数,并将其与参与键合的基态分子轨道中的原子轨道系数进行比较。他们表明:(i)未配对的电子基本上位于4 d x 2 - y 2金属离子轨道中,并与少量相应的金属离子4 d z 2轨道混合,z轴与C 2轴重合该化合物; (ii)除了在[铌(η较弱的离域5