[EN] SUBSTITUTED PIXYL PROTECTING GROUPS FOR OLIGONUCLEOTIDE SYNTHESIS<br/>[FR] GROUPES SUBSTITUES DE PROTECTION DE PIXYLE DESTINES A UNE SYNTHESE D'OLIGONUCLEOTIDES
申请人:ISIS PHARMACEUTICALS INC
公开号:WO2005077966A1
公开(公告)日:2005-08-25
The present invention describes an improved hydroxyl protecting group of formula (1), wherein R2 and R7 are specified substituents and Q is O, S, NR10 or N(C=O)R10.
Scalable synthesis of substituted 2,7-dimethyl-9-phenylxanthen-9-ol (DMPx-OH): useful for the preparation of crystalline 5′-O-DMPx-protected nucleosides
作者:Shyamapada Banerjee、P. Srishylam、S. Rajendra Prasad、Michael T. Migawa、Eric E. Swayze、Yogesh S. Sanghvi
DOI:10.1016/j.tetlet.2012.06.081
日期:2012.8
A convenient single-step synthesis of several 2,7-dimethyl-9-phenylxanthen-9-ol (DMPx-OH) analogs has been accomplished using a Friedel–Crafts reaction. Treatment of various DMPx-OH with unprotected 2′-O-methoxyethyl-ribonucleosides (MOE) in the presence of B(C6F5)3, as a Lewis Acid catalyst, furnished 5′-O-protected derivatives of 2′-MOE-ribonucleosides in good yields. The deprotection of the DMPx
使用Friedel-Crafts反应已经完成了几种2,7-二甲基-9-苯基黄嘌呤9-醇(DMPx-OH)类似物的便捷一步合成。在路易斯酸催化剂的B(C 6 F 5)3存在下,用未保护的2' - O-甲氧基乙基-核糖核苷(MOE)处理各种DMPx-OH ,得到5'- O-保护的2'-衍生物MOE-核糖核苷产率高。DMPx基团的脱保护是通过在非常温和的条件下进行酸水解来实现的。在合成的五个DMPx类似物中,2,7-二甲基-9-(4-硝基苯基)氧杂蒽-9-基团提供了结晶产物,使得能够进行非色谱分离5'- O - Protetcated核苷。
LXI.—Substituted diaryl ethers. Part III. A new synthesis of substituted xanthhydrols
作者:Joseph Reilly、Peter J. Drumm
DOI:10.1039/jr9300000455
日期:——
Substituted Pixyl Protecting Groups for Oligonucleotide Synthesis
申请人:Song Quanlai
公开号:US20070276139A1
公开(公告)日:2007-11-29
The present invention describes an improved hydroxyl protecting group of formula (1), wherein R
2
and R
7
are specified substituents and Q is O, S, NR
10
or N(C═O)R
10
.
Utility of 5′-<i>O</i>-2,7-Dimethylpixyl for Solid-Phase Synthesis of Oligonucleotides Containing Acid-Sensitive 8-Aryl-Guanine Adducts
作者:Michael Sproviero、Katherine M. Rankin、Aaron A. Witham、Richard A. Manderville
DOI:10.1021/jo4024842
日期:2014.1.17
To study the structural and biological impact of 8-aryl-2′-deoxyguanosine adducts, an efficient protocol is required to incorporate them site-specifically into oligonucleotide substrates. Traditional phosphoramidite chemistry using 5′-O-DMT protection can be limiting because 8-aryl-dG adducts suffer from greater rates of acid-catalyzed depurination than dG and are sensitive to the acidic deblock conditions
为了研究8-芳基-2'-脱氧鸟苷加合物的结构和生物学影响,需要有效的方案以将其位点特异性地掺入寡核苷酸底物中。使用5'- O - DMT保护的传统亚磷酰胺化学方法可能会受到限制,因为与dG相比,8-芳基-dG加合物的酸催化脱嘌呤速率更高,并且对去除DMT基团所需的酸性解封闭条件敏感。在本文中,我们显示5'- O -2,7-二甲基pixyl(DMPx)保护基可用于限制酸暴露并提高DNA合成效率,以用于包含8-芳基-dG加合物的DNA底物。我们的研究集中在具有由呋喃基(Fur dG),苯基(PhdG),4-氰基苯基(CNPh dG)和喹啉基(Q dG)。这些加合物的环大小和对酸促进的去糖基化的敏感性不同。在0.1 M HCl水溶液中进行加合物水解的动力学研究表明,Fur dG对酸最敏感(55.2倍> dG),而Q dG最耐酸(5.6倍> dG)。选择了对酸最敏感的Fur dG来优化固相DNA合成。我们的研究表明,与5'-