Phosphoramidite Synthesis Filtration for Higher Yield and Purity
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Solution Overview
Problem
Conventional methods for preparing phosphoramidites suffer from low yields and purities due to exposure to aqueous solvents and extractions, leading to increased costs and environmental impact.
Innovation Solution
Filtration is used instead of aqueous washes and extractions to separate phosphoramidite products from reaction byproducts, reducing the presence of reaction byproducts and minimizing decomposition, thereby increasing yields and purities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If aqueous washes and extractions are used to remove reaction byproducts, then reaction byproducts are removed, but phosphoramidite decomposition increases and yield decreases
Solution Approach 1:
The patent replaces the chemical mechanism of aqueous washes and extractions with a physical filtration mechanism. Instead of using water or organic solvents to chemically interact with and remove byproducts, the invention uses filtration to physically separate solid byproducts from the phosphoramidite product, eliminating the decomposition pathway while maintaining effective byproduct removal.
Solution Approach 2:
The patent changes the state parameter of the reaction mixture by filtering out solid byproducts, thereby altering the composition and preventing further decomposition reactions. This parameter change transforms the system from a chemically active state (with aqueous/organic solvents) to a physically separated state (filtrate), preserving phosphoramidite integrity.
2Loss of substance
If aqueous solvents and extractions are used, then reaction byproducts are removed, but phosphoramidite purity decreases
Solution Approach 1:
The patent substitutes chemical separation methods (aqueous washes, extractions) with a physical filtration system. This mechanical approach selectively removes solid byproducts without introducing moisture or organic solvents that would compromise phosphoramidite purity, thereby achieving both effective byproduct removal and high product purity.
3Loss of substance
If conventional purification methods are used, then reaction byproducts are removed, but decomposition occurs and yield is reduced
Solution Approach 1:
The patent replaces energy-intensive chemical purification processes (requiring water, organic solvents, and extensive washing) with a simple mechanical filtration system. This eliminates the energy input needed for solvent evaporation, mixing, and chemical reactions, while simultaneously preventing decomposition by avoiding contact with moisture and reactive solvents.
4Loss of substance
If aqueous washes and extractions are used, then reaction byproducts are removed, but costs increase
Solution Approach 1:
The patent replaces expensive chemical reagents (aqueous solvents, organic extraction solvents) with a simple filtration system that requires no additional chemicals. This eliminates costs associated with purchasing, handling, and disposing of large volumes of solvents, while also reducing waste disposal costs and improving overall manufacturing efficiency.
5Productivity
If halogenated solvents are used for extraction, then phosphoramidite products are recovered, but organic waste is generated
Solution Approach 1:
The patent substitutes halogenated solvent extraction with a mechanical filtration system that recovers phosphoramidite products without generating organic waste. The filtration process selectively removes solid byproducts while leaving the phosphoramidite product in the filtrate, eliminating the need for halogenated solvents and their associated environmental hazards and waste disposal requirements.
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
Filtration methods significantly enhance phosphoramidite yields and purities, decreasing decomposition and costs, while avoiding organic waste generation.
Implementation Method 1
performing a filtration step on the preparation to provide a filtrate, wherein the filtrate contains a reduced level of the one or more reaction byproducts relative to the product
Data Source
AI summary
The present disclosure, among other things, provides technologies for oligonucleotide synthesis. In some embodiments, the present disclosure provides phosphoramidites and methods for synthesis thereof. In some embodiments, provided methods provides higher yields and/or purities. In some embodiments, provided methods remove byproducts without contact with an aqueous solution.