Nimesulide Salts Ionization Solubility
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Solution Overview
Problem
Nimesulide, a non-steroidal anti-inflammatory drug (NSAID), suffers from poor water solubility, which limits its bioavailability and effectiveness in pharmaceutical preparations.
Innovation Solution
The development of new nimesulide salts, specifically tetramethylammonium and tetraethylammonium salts, which are crystallized in an ionized form, significantly enhancing their water solubility and bioavailability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If nimesulide is used in its pure form, then the drug structure is simple, but water solubility is poor (0.01 mg/mL)
Solution Approach 1:
The patent applies parameter changes by transforming nimesulide from its neutral molecular form to ionized salt forms (tetramethylammonium and tetraethylammonium salts). This chemical parameter transformation fundamentally alters the solubility characteristics, increasing water solubility from 0.01 mg/mL to at least 1.5 mg/mL while maintaining the core nimesulide therapeutic structure.
Solution Approach 2:
The invention creates composite crystalline structures by combining nimesulide anions with tetramethylammonium or tetraethylammonium cations. These composite salt crystals integrate two different chemical components into a single crystalline phase, achieving enhanced solubility through the synergistic interaction between the nimesulide anion and the quaternary ammonium cation.
2Quantity of substance
If nimesulide poor water solubility is addressed by using solvents, then solubility improves, but bioavailability remains limited
Solution Approach 1:
The patent changes the chemical parameter of nimesulide from neutral to ionized form through salt formation. This parameter transformation not only improves water solubility but also enhances bioavailability by creating a more favorable pharmacokinetic profile, allowing the drug to be effectively absorbed and distributed in the body.
Solution Approach 2:
The quaternary ammonium cations (tetramethylammonium or tetraethylammonium) act as intermediaries that facilitate the interaction between nimesulide and the aqueous environment. These cationic intermediaries form stable salt complexes with nimesulide anions, enabling improved solubility and bioavailability without requiring external solvents.
3Reliability
If nimesulide is used in conventional formulations, then the formulation is simple, but therapeutic effectiveness is reduced due to poor solubility
Solution Approach 1:
The invention transforms the chemical parameter of nimesulide into ionized salt forms, which directly addresses the solubility limitation and thereby improves therapeutic effectiveness. This parameter change enables the drug to achieve adequate concentrations in biological fluids for effective anti-inflammatory, analgesic, and antipyretic activity.
Solution Approach 2:
The patent creates multi-functional nimesulide salts that simultaneously provide anti-inflammatory, analgesic, and antipyretic effects while overcoming the solubility barrier. The tetramethylammonium and tetraethylammonium salts serve multiple purposes: maintaining the therapeutic activity of nimesulide while providing enhanced solubility and bioavailability properties.
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 new salts exhibit water solubility at least 100 times higher than pure nimesulide, leading to improved bioavailability and potential therapeutic benefits in analgesic, anti-inflammatory, and antipyretic applications.
Implementation Method 1
crystals of tetramethylammonium salt of nimesulide shown as formula 1 and tetraethylammonium salt of nimesulide, formula 2, in which nimesulide is present in an ionized form
Implementation Method 2
a method for producing a tetramethylammonium salt of nimesulide and a tetraethylammonium salt of nimesulide in the form of crystals
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention referes to the tetramethylammonium salt of nimesulide of formula 1: where nimesulide occurs in the ionised form, and the tetraethylammonium salt of nimesulide of formula 2: where nimesulide occurs in ionised form and how to obtain them.