Polyphosphate Synthesis via Phosphoramidite Intermediates
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Solution Overview
Problem
Current methods for synthesizing nucleoside 5'-triphosphates are inefficient, laborious, and produce byproducts, limiting their application in biological research and diagnostics due to the use of aggressive reagents and multi-stage processes.
Innovation Solution
A method involving the reaction of organic radicals with substituted derivatives of 2-pyridyl-[1,3,2]oxazaphospholidine or 2-pyrimidyl-[1,3,2]oxazaphospholidine, followed by activation with weak acids and oxidation with iodine, using polyphosphoric acid ammonium salts in organic solvents, to produce polyphosphates efficiently without byproducts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional chemical synthesis methods using activated nucleoside monophosphate and pyrophosphate are used, then nucleoside 5'-triphosphates can be obtained, but the process involves multiple laborious stages and produces byproducts that contaminate the target compound
Solution Approach 1:
The patent introduces a phosphoramidite intermediate compound as a mediator in the synthesis process. This intermediate reacts with pyrophosphate to form the triphosphate product, avoiding the direct reaction issues between activated nucleoside monophosphate and pyrophosphate. The phosphoramidite acts as a bridge that enables the reaction to proceed cleanly without generating contaminating byproducts.
Solution Approach 2:
The patent changes the chemical parameters of the reaction system by using phosphoramidite compounds with specific structural characteristics instead of conventional activated nucleoside monophosphates. This parameter change in the reactant structure enables a cleaner reaction pathway that produces fewer byproducts and allows for simpler purification.
2Ease of manufacture
If methods using strong acidic activators like 1H-tetrazole are employed for phosphates synthesis, then amidophosphite protonation can be achieved, but aggressive reagents are used which limit the usefulness of the method
Solution Approach 1:
The patent employs mild, non-aggressive activating reagents that can be easily removed or neutralized after the reaction, replacing the need for strong acidic activators like 1H-tetrazole. These milder reagents achieve sufficient protonation or activation without causing harm to the product or requiring complex removal steps, making the process more useful and safer.
Solution Approach 2:
The patent converts the potentially harmful effect of strong acid activation into a beneficial mild activation process. By using phosphoramidite intermediates, the reaction can proceed with much milder activating conditions, transforming what would be a harmful aggressive reagent requirement into a gentle, controlled activation that preserves product integrity and simplifies the overall process.
3Productivity
If multi-stage synthesis processes are used to obtain nucleotide triphosphates, then the desired product can be synthesized, but the reaction time is significantly lengthened and the process becomes more laborious
Solution Approach 1:
The patent merges multiple synthesis stages into a more streamlined process by using phosphoramidite intermediates that can directly react with pyrophosphate. This consolidation reduces the number of discrete steps required, eliminating intermediate isolation and purification stages that would otherwise extend the reaction time and increase labor requirements.
Solution Approach 2:
The patent performs preliminary formation of the phosphoramidite intermediate, which is then ready for direct reaction with pyrophosphate in a single subsequent step. This preliminary preparation of a reactive intermediate enables the main coupling reaction to proceed quickly and efficiently, reducing the overall time required compared to conventional multi-stage methods that lack this pre-activated intermediate step.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method simplifies the synthesis of nucleoside and oligonucleotide triphosphates, reducing reaction time and costs while minimizing byproducts, enabling the production of high-quality triphosphate analogues for biological applications.
Implementation Method 1
the amine is activated using weak acid, including especially 1-H-tetrazole or 5-ethylotio-1H-tetrazole
Implementation Method 2
followed by activation with weak acids and oxidation with iodine
Data Source
AI summary
The subject of the invention is a new method of the synthesis of polyphosphate analogues, such as nucleosides, oligonucleotides, carbohydrates, peptides and proteins, which are of biological importance and are used in organic chemistry, molecular biology and biotechnology. Polyphosphate analogues, including in particular nucleoside 5'-triphosphates, display high biological activity and are responsible for the provision and storage of energy in live organisms. The method relates to the synthesis of organic polyphosphates of general formula (1), where n has a value of 0 to 2, while X stands for an organic radical, in particular nucleoside, oligonucleotide, peptide-carbohydrate or a protein radical.