Nicotinamide Mononucleotide Synthesis via Ketalization
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Solution Overview
Problem
Current methods for synthesizing nicotinamide mononucleotide (NMN) are inefficient and difficult to scale up due to complex intermediates and high costs associated with enzymatic reactions, limiting the availability of this important precursor for increasing physiological NAD+ levels.
Innovation Solution
A multi-step chemical process involving the reaction of nicotinamide riboside with a ketalization reagent, followed by phosphorylation and acid-catalyzed deprotection, to produce NMN in higher yields and scalability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If enzymatic reactions are used for NMN synthesis, then the synthesis can be performed, but the cost is high and scalability is limited
Solution Approach 1:
The patent replaces enzymatic reactions with chemical reactions to synthesize NMN. Specifically, it uses chemical phosphorylation of nicotinamide riboside with phosphorus oxychloride and triethyl phosphate, followed by acid-catalyzed deprotection, to produce NMN without requiring expensive enzymes or specialized biological conditions, thereby enabling cost-effective and scalable production.
2Productivity
If existing chemical methods are used for NMN synthesis, then the synthesis can be performed, but the intermediates are complicated and isolation is difficult
Solution Approach 1:
The patent divides the synthesis into distinct sequential steps: (1) ketalization of nicotinamide riboside to form a protected intermediate, (2) phosphorylation of the protected intermediate using phosphorus oxychloride and triethyl phosphate, (3) acid-catalyzed deprotection to yield NMN. Each step uses simple, well-defined reagents and conditions, avoiding complex multi-component reactions and facilitating easy isolation and purification at each stage.
3Productivity
If existing chemical methods are used for NMN synthesis, then the synthesis can be performed, but the yields are low
Solution Approach 1:
The patent optimizes reaction parameters to achieve high yields: using excess phosphorus oxychloride (2.5-5 equivalents) and triethyl phosphate (5-10 equivalents) ensures complete phosphorylation; conducting the reaction at controlled temperatures (0°C to room temperature) prevents side reactions; using specific acid catalysts (trifluoromethanesulfonic acid or concentrated hydrochloric acid) at controlled concentrations and temperatures optimizes deprotection efficiency. These parameter optimizations collectively achieve high overall yields of NMN.
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
The process enables the efficient and scalable production of nicotinamide mononucleotide, overcoming the limitations of existing methods by simplifying the synthesis and reducing costs, thus providing a practical route for increasing NAD+ levels.
Implementation Method 1
reacting nicotinamide riboside with a ketalization reagent that is R1R2C(OR3)(OR4) or R1R2C═O, wherein R1 and R2 are independently C1-C6 alkyl or, taken together along with the carbon atom to which they are attached, form a 5-7 membered carbocyclic or heterocyclic ring, and wherein R3 and R4 are independently C1-C6 alkyl, in a solvent in the presence of an acid catalyst, to form a compound
Implementation Method 2
reacting the compound of formula (III) with a mixture of POCl3 and PO(OR5)3, wherein R5 is C1-C6 alkyl, followed by treatment with water to form a compound of formula (IV)
Implementation Method 3
reacting the compound of formula (IV) with an acid catalyst in a solvent or mixture of solvents to provide nicotinamide mononucleotide
Data Source
AI summary
The invention provides a process for the preparation of nicotinamide mononucleotide having formula (I):The method involves the protection of nicotinamide riboside by ketalization, followed by phosphorylation and then deprotection to provide nicotinamide mononucleotide.