1-Deaza-2'-deoxyadenosine: Phosphonate and Phosphoramidite Building Blocks for Solid-Phase Oligonucleotide Synthesis

Heterocycles ◽  
1993 ◽  
Vol 36 (2) ◽  
pp. 237 ◽  
Author(s):  
Frank Seela ◽  
Thomas Wenzel
2001 ◽  
Vol 66 (8) ◽  
pp. 1299-1314 ◽  
Author(s):  
Michal Lebl ◽  
Christine Burger ◽  
Brett Ellman ◽  
David Heiner ◽  
Georges Ibrahim ◽  
...  

Design and construction of automated synthesizers using the tilted plate centrifugation technology is described. Wash solutions and reagents common to all synthesized species are delivered automatically through a 96-channel distributor connected to a gear pump through two four-port selector valves. Building blocks and other specific reagents are delivered automatically through banks of solenoid valves, positioned over the individual wells of the microtiterplate. These instruments have the following capabilities: Parallel solid-phase oligonucleotide synthesis in the wells of polypropylene microtiter plates, which are slightly tilted down towards the center of rotation, thus generating a pocket in each well, in which the solid support is collected during centrifugation, while the liquid is expelled from the wells. Eight microtiterplates are processed simultaneously, providing thus a synthesizer with a capacity of 768 parallel syntheses. The instruments are capable of unattended continuous operation, providing thus a capacity of over two millions 20-mer oligonucleotides in a year.


2020 ◽  
Author(s):  
Guido Creusen ◽  
Cecilia Oluwadunsin Akintayo ◽  
Katja Schumann ◽  
Andreas Walther

Solid-phase oligonucleotide synthesis (SPOS) based on phosphoramidite chemistry is currently the most widespread technique for DNA and RNA synthesis, but suffers from scalability limitations and high reagent consumption. Liquid-phase oligonucleotide synthesis (LPOS) uses soluble polymer supports and has the potential of being scalable. However, at present, LPOS requires 3 separate reaction steps and 4-5 precipitation steps per nucleotide addition. Moreover, long acid exposure times during the deprotection step degrade sequences with high A-content (adenine) due to depurination and chain cleavage. In this work, we present the first one-pot liquid-phase DNA synthesis technique, which allows the addition of one nucleotide in a one-pot reaction of sequential coupling, oxidation and deprotection, followed by a single precipitation step. Furthermore, we demonstrate how to suppress depurination during the addition of adenine nucleotides. We showcase the potential of this technique to prepare high-purity 4-arm PEG‑T<sub>20</sub> (T = thymine) and 4-arm PEG-A<sub>20</sub>building blocks in multi-gram scale. Such complementary 4-arm PEG-DNA building blocks reversibly self-assemble into supramolecular model network hydrogels, and facilitate the elucidation of bond lifetimes. These model network hydrogels exhibit new levels of mechanical properties, high stability at room temperature (melting at 44 ‎°C), and thus open up pathways to next-generation, scalable DNA-materials programmable through sequence recognition and available for macroscale applications<i>.</i>


2020 ◽  
Author(s):  
Guido Creusen ◽  
Cecilia Oluwadunsin Akintayo ◽  
Katja Schumann ◽  
Andreas Walther

Solid-phase oligonucleotide synthesis (SPOS) based on phosphoramidite chemistry is currently the most widespread technique for DNA and RNA synthesis, but suffers from scalability limitations and high reagent consumption. Liquid-phase oligonucleotide synthesis (LPOS) uses soluble polymer supports and has the potential of being scalable. However, at present, LPOS requires 3 separate reaction steps and 4-5 precipitation steps per nucleotide addition. Moreover, long acid exposure times during the deprotection step degrade sequences with high A-content (adenine) due to depurination and chain cleavage. In this work, we present the first one-pot liquid-phase DNA synthesis technique, which allows the addition of one nucleotide in a one-pot reaction of sequential coupling, oxidation and deprotection, followed by a single precipitation step. Furthermore, we demonstrate how to suppress depurination during the addition of adenine nucleotides. We showcase the potential of this technique to prepare high-purity 4-arm PEG‑T<sub>20</sub> (T = thymine) and 4-arm PEG-A<sub>20</sub>building blocks in multi-gram scale. Such complementary 4-arm PEG-DNA building blocks reversibly self-assemble into supramolecular model network hydrogels, and facilitate the elucidation of bond lifetimes. These model network hydrogels exhibit new levels of mechanical properties, high stability at room temperature (melting at 44 ‎°C), and thus open up pathways to next-generation, scalable DNA-materials programmable through sequence recognition and available for macroscale applications<i>.</i>


2020 ◽  
Vol 24 (21) ◽  
pp. 2475-2497
Author(s):  
Andrea Verónica Rodríguez-Mayor ◽  
German Jesid Peralta-Camacho ◽  
Karen Johanna Cárdenas-Martínez ◽  
Javier Eduardo García-Castañeda

Glycoproteins and glycopeptides are an interesting focus of research, because of their potential use as therapeutic agents, since they are related to carbohydrate-carbohydrate, carbohydrate-protein, and carbohydrate-lipid interactions, which are commonly involved in biological processes. It has been established that natural glycoconjugates could be an important source of templates for the design and development of molecules with therapeutic applications. However, isolating large quantities of glycoconjugates from biological sources with the required purity is extremely complex, because these molecules are found in heterogeneous environments and in very low concentrations. As an alternative to solving this problem, the chemical synthesis of glycoconjugates has been developed. In this context, several methods for the synthesis of glycopeptides in solution and/or solid-phase have been reported. In most of these methods, glycosylated amino acid derivatives are used as building blocks for both solution and solid-phase synthesis. The synthetic viability of glycoconjugates is a critical parameter for allowing their use as drugs to mitigate the impact of microbial resistance and/or cancer. However, the chemical synthesis of glycoconjugates is a challenge, because these molecules possess multiple reaction sites and have a very specific stereochemistry. Therefore, it is necessary to design and implement synthetic routes, which may involve various protection schemes but can be stereoselective, environmentally friendly, and high-yielding. This review focuses on glycopeptide synthesis by recapitulating the progress made over the last 15 years.


1995 ◽  
Vol 50 (7) ◽  
pp. 1096-1100 ◽  
Author(s):  
Ernst Bayer ◽  
Konrad Bleicher ◽  
Martin Maier

Polystyrene-polyethylene glycol (PS-PEG) tentacle polymers with loadings of up to 60/<μmol/g were used for standard oligonucleotide synthesis. As these resins are easy to handle and stable under reaction and cleavage conditions they may be used alternatively to controlled pore glass (CPG) as the most commonly used solid support for oligonucleotide synthesis. However, structural and chemical properties of the PS-PEG resins require modified conditions to guarantee syntheses with high coupling efficiencies. Oligonucleotides (ODN ) of various sequences and lengths have successfully been synthesized using HPLC and capillary electrophoresis (CE) for purity control. Additionally, electrospray mass spectrometry (ES-MS) was used for product identification.


2021 ◽  
Author(s):  
Alexander Banger ◽  
Julian Sindram ◽  
Marius Otten ◽  
Jessica Kania ◽  
Alexander Strzelczyk ◽  
...  

We present the synthesis of so called amphiphilic glycomacromolecules (APGs) by using solid-phase polymer synthesis. Based on tailor made building blocks, monosdisperse APGs with varying compositions are synthesized, introducing carbohydrate...


ChemInform ◽  
2010 ◽  
Vol 25 (27) ◽  
pp. no-no
Author(s):  
F. BARDELLA ◽  
R. ERITJA ◽  
E. PEDROSO ◽  
E. GIRALT

2005 ◽  
Vol 7 (4) ◽  
pp. 597-600 ◽  
Author(s):  
Fernando Albericio ◽  
Klaus Burger ◽  
Javier Ruíz-Rodríguez ◽  
Jan Spengler

ChemInform ◽  
2010 ◽  
Vol 24 (18) ◽  
pp. no-no
Author(s):  
C. PANNECOUQUE ◽  
P. WIGERINCK ◽  
A. VAN AERSCHOT ◽  
P. HERDEWIJN

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