Bempedoic Acid Synthesis with Staged Purification for 99% Purity
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Solution Overview
Problem
The development of robust, cost-effective, and efficient manufacturing methods for producing bempedoic acid with desired yield and purity remains a challenge, particularly for commercialization as a pharmaceutical drug.
Innovation Solution
A multi-step synthetic process involving the reaction of ethyl isobutyrate with substituted 5-chloropentane, followed by salt formation, toluenesulfonylmethyl isocyanide interaction, and reduction, culminating in high-purity bempedoic acid formation, with purification steps including pH adjustment, solvent exchange, and crystallization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional manufacturing methods are used for bempedoic acid, then production cost and time are reduced, but product purity and impurity profile fail to meet regulatory requirements
Solution Approach 1:
The synthesis process is divided into multiple discrete steps with specific purification operations at each stage. The multi-step sequence includes salt formation, toluenesulfonylmethyl isocyanide interaction, reduction, and hydrolysis, with purification steps (pH adjustment, solvent exchange, crystallization) interspersed throughout to maintain product purity while managing manufacturing complexity systematically
Solution Approach 2:
Purification steps are performed at predetermined stages before final product completion. The process applies pH adjustment, solvent exchange, and crystallization operations at specific intermediate points to prevent impurity accumulation, ensuring the final product meets regulatory purity requirements without requiring excessive post-processing
2Manufacturing precision
If multiple purification steps are added to increase product purity, then impurity control improves, but manufacturing time and cost increase
Solution Approach 1:
The purification process maintains continuous useful action through a sequence of interconnected operations where each step builds on the previous one. The process flows continuously from pH adjustment to solvent exchange to crystallization, with each operation preparing the material for the next, minimizing idle time and maximizing overall manufacturing efficiency while achieving >99.0% purity
Solution Approach 2:
The process systematically changes physical and chemical parameters at each purification stage to drive impurity removal. pH is adjusted to specific ranges, solvents are exchanged between different types (aqueous to organic), and crystallization conditions are controlled, allowing efficient separation of impurities from the target compound through controlled parameter transitions
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 achieves bempedoic acid with purity greater than 99.0% by weight, suitable for pharmaceutical use, addressing the challenges of impurity control and yield in the synthesis.
Implementation Method 1
contacting the compound of formula (IV) with a reducing agent to form a second intermediate
Implementation Method 2
contacting the second intermediate with a hydrolyzing base to form a compound of formula (V)
Implementation Method 3
crystallizing the compound of formula (V) using ethyl acetate and water to provide a crystalline form of the compound of formula (V)
Data Source
AI summary
The invention provides methods of preparing 8-hydroxy-2,2,14,14-tetramethylpentadecanedioic acid and methods of making a pharmaceutical material comprising a purified amount of 8-hydroxy-2,2,14,14-tetramethylpentadecanedioic acid. Also provided are compositions and pharmaceutical materials including a purified amount of 8-hydroxy-2,2,14,14-tetramethylpentadecanedioic acid as well as methods of treating various diseases and conditions using the compositions and pharmaceutical materials.