Triaminopyrimidine Preparation via Scalable Recrystallization
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Solution Overview
Problem
Existing processes for preparing triaminopyrimidine compounds are not industrially scalable, require microwave conditions, and result in lower yields and impurities, making them unsuitable for pharmaceutical applications.
Innovation Solution
A process using appropriate solvent systems and isolation techniques, avoiding microwave reactions and chromatographic purifications, to produce triaminopyrimidine compounds in higher yields and purities, including crystalline forms and hydrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If microwave technique and reverse phase HPLC are used for preparation and purification, then the triaminopyrimidine compound can be obtained, but the yield is low (40.8%) and the process is not industrially scalable
Solution Approach 1:
The patent changes the purification method from reverse phase HPLC to recrystallization from ethyl acetate, and changes the reaction conditions from microwave irradiation to conventional heating. These parameter changes result in improved yield (from 40.8% to higher yields) while maintaining pharmaceutical-grade purity suitable for formulation
Solution Approach 2:
The patent replaces the microwave heating system with conventional heating methods, and replaces the HPLC purification system with simple recrystallization. This substitution makes the process industrially scalable while achieving the desired purity and yield
2Manufacturing precision
If microwave conditions and chromatographic purification are used, then the triaminopyrimidine compound can be prepared, but the process complexity increases and industrial scalability is reduced
Solution Approach 1:
The patent extracts and eliminates the complex microwave apparatus and HPLC chromatography system from the process, replacing them with simple conventional heating and recrystallization techniques. This reduces device complexity while maintaining pharmaceutical-grade purity
Solution Approach 2:
Instead of using advanced technology (microwave + HPLC) to achieve purity, the patent inverts the approach by using simple recrystallization from ethyl acetate, which unexpectedly provides pharmaceutical-grade purity with much lower process complexity
3Ease of manufacture
If conventional preparation methods are used, then the process is simpler, but the yield and purity are insufficient for pharmaceutical applications
Solution Approach 1:
The patent changes the solvent system to ethyl acetate for recrystallization and uses conventional heating instead of microwave irradiation. These parameter changes maintain process simplicity while achieving pharmaceutical-grade purity (>98%) suitable for formulation
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 triaminopyrimidine compounds with purities of 98% or more, overcoming the limitations of lower yields and impurities in existing methods, suitable for pharmaceutical formulations.
Implementation Method 1
The present invention provides solid state forms of triaminopyrimidine compound 1
Implementation Method 2
or hydrates, or solvates, or polymorphs, or optically active forms thereof
Data Source
AI summary
The present invention relates to triaminopyrimidine compound 1, or pharmaceutically acceptable salts thereof, or hydrates, or solvates, or polymorphs, or optically active forms thereof, in solid state forms. The invention also relates to a process for preparation of triaminopyrimidine compound and intermediates thereof. The present invention also relates to a pharmaceutical composition comprising pure triaminopyrimidine compound, useful for preventing or treating malaria.