Naphthylamine Solid Forms for Selective Mitophagy Induction
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Solution Overview
Problem
Existing technologies lack effective mitophagy inducers that can selectively induce autophagy in damaged mitochondria, leading to accumulation of dysfunctional mitochondria and associated pathological consequences.
Innovation Solution
Development of various solid forms of naphthylamine-type compounds, including pharmaceutically usable salts such as sodium, potassium, calcium, tromethamine, lysine, tert-butylammonium, diisopropylammonium, ethanolammonium, and diethanolammonium salts, characterized by specific X-ray diffraction, differential scanning calorimetry, and thermogravimetric analysis patterns, to enhance mitophagy and address mitochondrial dysfunction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mitophagy inducers are developed to remove damaged mitochondria, then cellular function is maintained, but selective induction of autophagy in damaged mitochondria remains insufficient
Solution Approach 1:
The patent modifies the chemical structure of naphthylamine compounds by changing parameters such as substituting hydrogen atoms at specific positions (e.g., position 6 or 7) with functional groups like carboxyl, hydroxyl, or amino groups. These structural parameter changes enhance the compound's ability to selectively induce mitophagy while reducing harmful effects, directly addressing the contradiction between effective mitophagy induction and prevention of dysfunctional mitochondria accumulation.
Solution Approach 2:
The patent creates composite chemical structures by combining naphthylamine core with various functional groups and moieties (e.g., forming salts with organic or inorganic acids). These composite structures enable the compound to interact with multiple cellular targets simultaneously, improving selective mitophagy induction while minimizing the accumulation of harmful dysfunctional mitochondria.
2Reliability
If naphthylamine compounds are used as mitophagy inducers, then biological activity is enhanced, but crystalline stability and bioavailability need optimization
Solution Approach 1:
The patent optimizes crystalline stability by changing physical and chemical parameters of the naphthylamine compounds, including forming specific salt forms (e.g., with organic or inorganic acids), adjusting molecular weight, and modifying functional groups. These parameter changes maintain high biological activity while improving crystalline stability and bioavailability, resolving the contradiction between enhanced biological activity and optimized stability.
3Reliability
If solid forms of naphthylamine compounds are prepared, then bioavailability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the manufacturing process into distinct steps: synthesis of naphthylamine core, introduction of functional groups, formation of salt forms, and purification. This segmentation allows each step to be optimized independently, improving bioavailability through specific solid form preparation while managing manufacturing complexity by breaking down the overall process into manageable segments.
Solution Approach 2:
The patent simplifies manufacturing by changing parameters such as selecting appropriate solvents, temperatures, and pH levels during crystallization. These parameter optimizations enable the formation of stable solid forms with high bioavailability through relatively simple processes, reducing the overall manufacturing complexity while maintaining improved bioavailability.
Data Source
AI summary
The present application discloses solid form of naphthylamine-type mitochondrial autophagy inducer, and preparation method therefor, pharmaceutical composition and use thereof. Various solid forms of the compound of formula (I) are prepared and obtained in the present application, such as sodium salt, potassium salt, calcium salt, tromethamine salt, lysine salt, tert-butylammonium salt, diisopropylammonium salt, ethanolammonium salt, and diethanolammonium salt of the compound of formula (I).