Crystalline Salt Forms for NSCLC EGFR Exon 20
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Solution Overview
Problem
The challenge lies in predicting and achieving stable salt forms of organic basic compounds, particularly those with multiple basic centers, for effective drug development, as existing methods fail to reliably determine suitable acid combinations, equivalent ratios, and resulting properties such as chemical stability, physical stability, and solubility.
Innovation Solution
The development of specific crystalline forms of mesylate, hydrochloride, and maleate salts of a compound, characterized by unique X-ray powder diffraction patterns, which exhibit improved chemical stability, physical stability, and solubility, making them suitable for drug development, particularly for treating non-small cell lung cancer with EGFR exon 20 insertion mutation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If salt formation is performed on organic basic compounds with multiple basic centers, then the compound can form stable salts with various acids, but it becomes impossible to predict which acid combinations produce salts with desired properties (chemical stability, physical stability, solubility)
Solution Approach 1:
The patent systematically varies multiple parameters including acid type, equivalent ratio, and crystallization conditions to generate a comprehensive dataset of salt forms. This parameter exploration enables prediction of salt properties by establishing structure-activity relationships between formation conditions and resulting salt characteristics.
Solution Approach 2:
The patent employs iterative screening and characterization of salt forms, using X-ray diffraction, NMR, and stability testing to evaluate each salt's properties. This feedback loop allows optimization of salt formation conditions based on observed results, improving predictability for subsequent salt development.
2Adaptability or versatility
If multiple equivalent ratios of acid to base are used in salt formation, then more salt forms can be generated, but the complexity of determining which ratio produces the most suitable salt increases
Solution Approach 1:
The patent divides the salt formation process into discrete, manageable experiments with specific equivalent ratios (1:1, 1:2, 2:1, etc.). Each segment tests a specific ratio condition systematically, making the overall complex process of evaluating multiple ratios more manageable and predictable through structured experimentation.
Solution Approach 2:
The patent evaluates multiple equivalent ratios beyond what might be immediately obvious (including 1:1, 1:2, 2:1 and other ratios), ensuring that the optimal salt form is identified. This excessive exploration of ratio possibilities ensures comprehensive coverage of potential salt forms for optimal drug development.
3Stability of the object's composition
If crystallization is performed on salt forms, then additional properties (stability, processability, druggability) can be improved, but it becomes impossible to determine which crystalline form has the most desirable properties
Solution Approach 1:
The patent systematically varies crystallization parameters including temperature, solvent composition, pH, and cooling rates to generate different crystalline forms. By establishing relationships between these parameters and the resulting crystal structure and properties, the patent enables prediction of which crystalline form will have desired stability and druggability characteristics.
Solution Approach 2:
The patent replaces trial-and-error crystallization approaches with computational methods and predictive models that use X-ray diffraction data and thermodynamic calculations to forecast crystalline form properties before synthesis, reducing the need for extensive experimental screening.
4Ease of manufacture
If general guidance on crystallization is followed, then crystallization can be performed, but it cannot enable determination of specific crystalline form properties or prediction of suitable forms for drug development
Solution Approach 1:
The patent employs comprehensive characterization techniques including X-ray powder diffraction, single-crystal X-ray analysis, NMR spectroscopy, and thermal analysis to precisely measure and verify crystalline form properties. This detailed feedback from multiple analytical methods enables accurate determination and prediction of crystalline form characteristics for drug development decisions.
Solution Approach 2:
The patent supplements traditional experimental crystallization with computational chemistry methods, molecular docking, and predictive algorithms that model crystal packing and stability before actual crystallization occurs, enhancing the precision of crystalline form prediction without requiring extensive experimental trial and error.
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
These crystalline salt forms demonstrate enhanced bioavailability and increased dynamic solubility, addressing the unpredictability of salt formation and stability in drug development, and show promise in treating non-small cell lung cancer effectively.
Implementation Method 1
characterized by unique X-ray powder diffraction patterns
Data Source
AI summary
The present application relates to the crystalline form of the mesylate salt, the crystalline form of the hydrochloride salt and the crystalline form of the maleate salt of a compound of formula (I):The present application also relates to a method for treating non-small cell lung cancer (NSCLC) with EGFR exon 20 insertion mutation using the crystalline forms. The present application also relates to synthetic routes for the compound of formula (I).