Anhydrous Crystalline 3-Substituted Oxadiazole Formulation
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Solution Overview
Problem
There is a need for improved compositions and methods for preparing and formulating 3-substituted 1,2,4-oxadiazole compounds, which act as immunomodulators, to enhance their therapeutic benefits in treating cancer, immune disorders, and other conditions.
Innovation Solution
The development of an anhydrous crystalline compound with the structure of formula (I) and methods for its preparation, including crystallization from mixtures with solvents and anti-solvents, to produce a pharmaceutical preparation suitable for human use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional preparation methods are used for 3-substituted 1,2,4-oxadiazole compounds, then the compounds can be obtained, but their stability and purity are insufficient for optimal therapeutic use
Solution Approach 1:
The patent applies parameter changes by optimizing crystallization conditions including solvent selection (ethanol, isopropanol, acetonitrile, toluene), temperature ranges (0-25°C), pH values (2-7), and addition rates of anti-solvents. These parameter modifications enable the formation of a stable anhydrous crystalline form with improved purity, directly resolving the contradiction between stability and manufacturing precision
Solution Approach 2:
The patent utilizes phase transitions through controlled crystallization processes where the compound transitions from solution phase to solid crystalline phase. By controlling the phase transition conditions (temperature, solvent composition, cooling rate), the patent achieves a stable crystalline form with high purity, addressing both the stability and manufacturing precision requirements
2Reliability
If conventional formulations are used, then the compounds can be administered, but their therapeutic benefits are not optimized
Solution Approach 1:
The patent modifies formulation parameters including pH adjustment (using HCl or NaOH to achieve pH 2-7), solvent selection, and concentration control. These parameter changes optimize the therapeutic benefits while maintaining ease of manufacture through straightforward pH adjustment and filtration steps
Solution Approach 2:
The patent creates a standardized crystalline form that can be replicated through consistent crystallization protocols. By establishing a reproducible crystallization method with defined parameters (solvent, temperature, pH), the patent enables easy manufacturing of a formulation that delivers optimized therapeutic benefits
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 anhydrous crystalline compound of formula (I) exhibits improved stability and purity, retaining its crystal structure and chemical integrity under various conditions, making it suitable for pharmaceutical applications in treating immune-related disorders and cancers.
Implementation Method 1
crystallizing the compound of formula (I) from the mixture comprising the compound of formula (I)
Data Source
AI summary
The invention relates to crystalline forms of a 3-substituted 1,2,4-oxadiazole compound, including an anhydrous crystalline form, methods of their preparation, and related pharmaceutical preparations thereof. The invention also relates to preparations suitable for pharmaceutical, veterinary, and agriculturally-relevant uses.