NRH Production via Sodium Dithionite Reduction
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Solution Overview
Problem
Current methods for producing 1,4-dihydronicotinamide riboside (NRH) are inefficient, costly, and not scalable due to the use of expensive and non-food grade precursors, with limited availability and stability issues, hindering its commercialization and effectiveness as a potent NAD+ precursor.
Innovation Solution
A method involving the reduction of nicotinamide riboside chloride (NRCl) using a dithionite reducing agent in a liquid solution under anaerobic and basic conditions, followed by column chromatography for high-yield and high-purity production of NRH, utilizing commercially available and food-grade starting materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If nicotinamide riboside triflate is used as precursor, then NRH can be synthesized, but the precursor is expensive, hygroscopic, requires storage at -20°C under inert atmosphere, and is non-food grade
Solution Approach 1:
The patent changes the precursor from nicotinamide riboside triflate to nicotinamide riboside chloride, altering the chemical parameter to improve handling properties. The chloride salt is less hygroscopic, stable at room temperature, and food-grade, while still enabling NRH synthesis through reduction with sodium dithionite
Solution Approach 2:
The patent replaces the expensive, unstable triflate precursor with a cheaper, stable chloride precursor that can be stored and handled under normal conditions. This substitution reduces costs and eliminates the need for specialized storage infrastructure
2Productivity
If triacetylated nicotinamide riboside triflate is used, then scalable synthesis with good yield is achieved, but the precursor is expensive and non-food grade requiring complete purification
Solution Approach 1:
The patent changes both the chemical structure (removing acetyl groups) and the salt form (from triflate to chloride) of the precursor. This results in nicotinamide riboside chloride, which is food-grade, stable, and does not require extensive purification while maintaining good synthesis yield
Solution Approach 2:
The patent extracts and removes the problematic triflate anion and acetyl groups from the precursor structure, retaining only the essential nicotinamide riboside core with a chloride counterion, thereby eliminating the need for complex purification steps
3Manufacturing precision
If aqueous solution of sodium dithionite is used as reducing agent, then reduction of precursor to NRH is achieved, but the solution is unstable at ambient conditions requiring low temperature and anaerobic alkaline conditions
Solution Approach 1:
The patent optimizes the pH parameter to alkaline conditions (pH 8-10) which stabilizes the sodium dithionite solution, allowing it to be used at ambient temperature and atmosphere. The alkaline environment prevents decomposition of the reducing agent while enabling the reduction reaction to proceed
4Productivity
If NRH is produced using conventional methods, then synthesis is achieved, but NRH is sensitive to hydrolysis and oxidation requiring immediate HPLC purification
Solution Approach 1:
The patent creates a protected environment by conducting the reduction reaction under anaerobic conditions (nitrogen or argon atmosphere), which prevents oxidation of NRH during synthesis. This allows the product to remain stable without requiring immediate complex purification
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 achieves a significantly higher yield and purity of NRH, enhancing its stability and bioavailability, making it a more effective and commercially viable NAD+ precursor compared to existing methods.
Implementation Method 1
the reduction of nicotinamide riboside chloride (NRCl) using a dithionite reducing agent
Implementation Method 2
A method involving the reduction of nicotinamide riboside chloride (NRCl) using a dithionite reducing agent
Implementation Method 3
followed by column chromatography for high-yield and high-purity production of NRH
Data Source
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AI summary
A method of producing 1,4-dihydronicotinamide riboside (NRH) is disclosed. The method comprises providing nicotinamide riboside chloride (NRCl) in a liquid solution; adding a metal dithionite into the liquid solution under a first temperature; and reacting the metal dithionite with the nicotinamide riboside chloride (NRCl) in the liquid solution under a second temperature to form a mixture, wherein at least a portion of the mixture comprises the 1,4-dihydronicotinamide riboside (NRH).