Oligonucleic Acid Synthesis Mixed Solvent Resin Swelling
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Solution Overview
Problem
Current methods for preparing oligonucleic acid compounds face challenges in controlling the reaction efficiency and rate of the condensation reaction, particularly due to steric hindrance in solid-phase methods and the use of polar or non-polar solvents which affect the preparation period.
Innovation Solution
A mixed solvent system containing a polar solvent and a halogen solvent is used for the condensation reaction, facilitating efficient formation of phosphate bonds between nucleoside units, thereby shortening the preparation time of oligonucleic acid compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a polar solvent such as acetonitrile is used in the solid-phase method, then the reaction conditions are improved for oligonucleic acid synthesis, but the degree of swelling of the polystyrene resin is not high, resulting in decreased reaction efficiency and reaction rate of the condensation reaction
Solution Approach 1:
The patent changes the physical-chemical parameters of the reaction solvent by using a non-polar solvent (chloroform, dichloromethane, or 1,2-dichloroethane) instead of traditional polar solvents. This parameter change induces high swelling of the polystyrene resin, improving both reaction efficiency and reaction rate while maintaining suitable reaction conditions for oligonucleic acid synthesis
Solution Approach 2:
The patent employs a composite approach by combining a specific non-polar solvent with a solid-phase carrier (polystyrene resin), creating an optimized reaction system where the solvent-resin interaction produces enhanced swelling effects that simultaneously improve reaction conditions and productivity
2Productivity
If a non-polar solvent such as chloroform is used in the homogeneous reaction method, then the reaction can be carried out in a homogeneous system with higher reaction efficiency, but the condensation reaction requires a very long time
Solution Approach 1:
The patent optimizes the parameters of the non-polar solvent system by selecting specific solvents (chloroform, dichloromethane, or 1,2-dichloroethane) and adjusting reaction conditions, which reduces the reaction time from very long to a practical duration while maintaining high reaction efficiency in the homogeneous system
3Ease of manufacture
If the solid-phase method is used, then the reaction can be performed with a supported substrate, but the reactivity of the condensation reaction decreases due to steric hindrance caused by the solid-phase carrier
Solution Approach 1:
The patent changes the solvent parameter from polar to non-polar, which fundamentally alters the swelling behavior of the solid-phase carrier. This parameter change reduces steric hindrance by increasing resin swelling, thereby improving the reactivity of the condensation reaction while maintaining the advantages of the solid-phase method
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 approach enhances the reaction efficiency and rate of phosphate bond formation, leading to a reduced preparation time for oligonucleic acid compounds without the limitations of traditional solvent systems.
Implementation Method 1
During the reaction, the polystyrene resin swells due to the reaction solvent used, and its volume becomes larger than that in a dry state. The degree of swelling depends on the reaction solvent.
Implementation Method 2
a mixed solvent containing a polar solvent and a halogen solvent is used for the condensation reaction, facilitating efficient formation of phosphate bonds between nucleoside units
Data Source
AI summary
A method for subjecting a compound [A] having a hydroxyl group or a primary or secondary amino group and a compound [B] having a substituent containing a phosphorus atom to a condensation reaction to prepare a compound [C] represented by the following general formula [C]:wherein the condensation reaction is carried out in a mixed solvent containing a polar solvent and a halogen solvent as a reaction solvent.