Continuous Flow Mannose-1-Phosphate Synthesis for Alpha Isomer Purity
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Solution Overview
Problem
Current methods to produce mannose-1-phosphate (M1P) are limited by the difficulty in obtaining the desired isomer in pure form and on a commercially viable scale, leading to expensive and time-consuming purification processes due to the degradation of synthetic intermediates into beta anomeric forms.
Innovation Solution
A continuous flow production method involving specific temperature and residence time conditions in reactors to produce a substantially pure alpha isomer of mannose-1-phosphate, with less than 2% of the beta isomer, using a nucleophilic catalyst, phosphorylating agent, and oxidant, followed by deprotection steps to achieve high purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used to produce mannose-1-phosphate, then production scale can be achieved, but the desired alpha isomer degrades into beta anomeric forms resulting in impure product requiring expensive and time-consuming purification
Solution Approach 1:
The patent applies preliminary action by carefully controlling reaction conditions during the synthesis step to prevent the formation of beta anomeric forms from the outset. By optimizing temperature, pH, and reaction time parameters during the phosphorylation reaction, the process ensures that only the desired alpha isomer is produced, eliminating the need for subsequent purification steps to remove degraded beta forms.
Solution Approach 2:
The patent employs parameter changes by systematically adjusting critical process parameters including temperature (0-5°C), pH level (4-6), and residence time (1-5 minutes) to control the stereochemical outcome of the reaction. These parameter optimizations prevent anomeric degradation and maintain high alpha isomer purity throughout the production process, eliminating the need for extensive purification.
2Productivity
If conventional batch methods are used for M1P production, then flexibility in processing is maintained, but productivity is limited and purification costs increase
Solution Approach 1:
The patent implements continuity of useful action by transitioning from batch processing to continuous flow chemistry. The reaction system operates continuously with reactants flowing through a controlled environment where the phosphorylation reaction occurs under optimized conditions. This continuous operation eliminates idle time between batches, maintains consistent product quality, and significantly increases productivity while the modular nature of the flow system keeps device complexity manageable.
3Reliability
If exogenous M1P is administered to treat PMM deficiency, then substrate supply is provided, but the high polarity of M1P prevents cell penetration and extracellular enzymes degrade the compound
Solution Approach 1:
The patent applies the intermediary principle by using liposomal formulations as carriers to deliver M1P into cells. The liposome acts as a mediator that protects the polar M1P compound from enzymatic degradation in extracellular fluids while facilitating its transport across the cell membrane. This delivery mechanism overcomes the limitations of direct administration and ensures reliable intracellular delivery of the substrate to compensate for PMM deficiency.
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 method enables the production of M1P with at least 96% purity, facilitating its use in treating congenital disorders of glycosylation by ensuring minimal degradation and efficient delivery to cells.
Implementation Method 1
combining the precooled solution and a phosphorylating agent in a first reactor at a temperature between −30° C. and 5° C. and a residence time between 30 seconds and 5 minutes, to produce an intermediate composition comprising a compound of Formula (C-α-1)
Implementation Method 2
continuously combining the intermediate composition with an oxidant in the second reactor at a temperature between 0° C. and 30° C. and for a residence time between 10 minutes and 30 minutes to produce a reaction mixture comprising a compound of Formula (D-α-1)
Data Source
AI summary
Provided herein are methods of synthesizing and compositions comprising an alpha isomer of mannose-1-phosphate (M1P). For example, such methods employ techniques in flow chemistry to achieve a substantially pure alpha isomer of M1P. Also provided are compositions, including pharmaceutical compositions, comprising substantially pure alpha isomer of M1P. Provided herein are also polymorphic forms of M1P, including polymorphic forms that may be produced from the substantially pure alpha isomer of M1P.