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{"title":"Immobilized Carbohydrates for Preparation of 3′-Glycoconjugated Oligonucleotides","authors":"Tommi Österlund, Aapo Aho, Antti Äärelä, Ville Tähtinen, Heidi Korhonen, Pasi Virta","doi":"10.1002/cpnc.122","DOIUrl":null,"url":null,"abstract":"<p>A detailed protocol for preparation 3′-glycoconjugated oligonucleotides is described based on one-pot immobilization of 4,4′-dimethoxytrityl-protected carbohydrates to a solid support followed by on-support peracetylation and automated oligonucleotide assembly. Compared to an appropriate building block approach and post-synthetic manipulation of oligonucleotides, this protocol may simplify the synthesis scheme and increase overall yield of the conjugates. Furthermore, the immobilization to a solid support typically increases the stability of reactants, enabling prolonged storage, and makes subsequent processing convenient. Automated assembly on these carbohydrate-modified supports using conventional phosphoramidite chemistry produces 3′-glycoconjugated oligonucleotides in relatively high yield and purity. © 2020 Wiley Periodicals LLC.</p><p><b>Basic Protocol 1</b>: Synthesis of 1-<i>O</i>-<i>tert</i>-butyldimethylsilyl-6-<i>O</i>-(4,4′-dimethoxytrityl)-β-<span>D</span>-glucose</p><p><b>Basic Protocol 2</b>: Synthesis of 6-<i>O</i>-dimethoxytrityl-2,3,1′,3′,4′,6′-hexa-<i>O</i>-benzoylsucrose</p><p><b>Basic Protocol 3</b>: Synthesis of 6″-<i>O</i>-dimethoxytrityl-<i>N</i>-trifluoroacetyl-protected aminoglycosides</p><p><b>Basic Protocol 4</b>: Synthesis of 3-<i>O</i>-dimethoxytrityl-propyl β-<span>D</span>-galactopyranoside</p><p><b>Basic Protocol 5</b>: Synthesis of trivalent <i>N</i>-acetyl galactosamine cluster</p><p><b>Basic Protocol 6</b>: Synthesis of carbohydrate monosuccinates and their immobilization to a solid support</p><p><b>Basic Protocol 7</b>: Oligonucleotide synthesis using immobilized carbohydrates</p>","PeriodicalId":10966,"journal":{"name":"Current Protocols in Nucleic Acid Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2020-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/cpnc.122","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Current Protocols in Nucleic Acid Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/cpnc.122","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Chemistry","Score":null,"Total":0}
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Abstract
A detailed protocol for preparation 3′-glycoconjugated oligonucleotides is described based on one-pot immobilization of 4,4′-dimethoxytrityl-protected carbohydrates to a solid support followed by on-support peracetylation and automated oligonucleotide assembly. Compared to an appropriate building block approach and post-synthetic manipulation of oligonucleotides, this protocol may simplify the synthesis scheme and increase overall yield of the conjugates. Furthermore, the immobilization to a solid support typically increases the stability of reactants, enabling prolonged storage, and makes subsequent processing convenient. Automated assembly on these carbohydrate-modified supports using conventional phosphoramidite chemistry produces 3′-glycoconjugated oligonucleotides in relatively high yield and purity. © 2020 Wiley Periodicals LLC.
Basic Protocol 1 : Synthesis of 1-O -tert -butyldimethylsilyl-6-O -(4,4′-dimethoxytrityl)-β-D -glucose
Basic Protocol 2 : Synthesis of 6-O -dimethoxytrityl-2,3,1′,3′,4′,6′-hexa-O -benzoylsucrose
Basic Protocol 3 : Synthesis of 6″-O -dimethoxytrityl-N -trifluoroacetyl-protected aminoglycosides
Basic Protocol 4 : Synthesis of 3-O -dimethoxytrityl-propyl β-D -galactopyranoside
Basic Protocol 5 : Synthesis of trivalent N -acetyl galactosamine cluster
Basic Protocol 6 : Synthesis of carbohydrate monosuccinates and their immobilization to a solid support
Basic Protocol 7 : Oligonucleotide synthesis using immobilized carbohydrates
固定化碳水化合物制备3′-糖缀合寡核苷酸
制备3 ' -糖缀合寡核苷酸的详细方案描述了基于一锅固定的4,4 ' -二甲氧基三烷基保护碳水化合物到固体载体,然后在载体上过乙酰化和自动寡核苷酸组装。与适当的构建块方法和合成后寡核苷酸操作相比,该方案可以简化合成方案并提高共轭物的总收率。此外,固定到一个坚实的支持通常增加反应物的稳定性,使长时间的储存,并使后续处理方便。在这些碳水化合物修饰的载体上使用传统的磷酸酰胺化学自动组装,以相对较高的收率和纯度生产3 ' -糖缀合寡核苷酸。©2020 Wiley期刊有限公司基本方案1:合成1- o -叔丁基二甲基硅基-6- o -(4,4 ' -二甲氧基三酰基)-β- d -葡萄糖基本方案2:合成6- o -二甲氧基三酰基-2,3,1 ',3 ',4 ',6 ' -六- o -苯甲酰蔗糖基本方案3:合成6-″- o -二甲氧基三酰基- n -三氟乙酰保护氨基糖苷基本方案4:合成3- o -二甲氧基三酰基β- d -半乳糖糖苷基本方案5:合成三价n -乙酰半乳糖胺簇基本方案6:合成3- o -二甲氧基三酰基碳水化合物单琥珀酸酯的合成及其在固体载体上的固定化基本方案7:利用固定化碳水化合物合成寡核苷酸
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