Macrocyclic Orexin-2 Agonists for Brain Permeability and Safety
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Solution Overview
Problem
Existing orexin-2 receptor agonists are not satisfactory in terms of activity, pharmacokinetics, permeability into the brain/central nervous system, or safety, necessitating the development of improved compounds for treating conditions like narcolepsy and other disorders.
Innovation Solution
Development of substituted macrocyclic compounds with specific structural formulas (I and II) that act as orexin-2 receptor agonists, providing enhanced activity and safety profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing orexin-2 receptor agonist compounds are used, then some level of receptor activity is achieved, but the activity, pharmacokinetics, brain permeability, and safety are not satisfactory
Solution Approach 1:
The patent applies parameter changes by systematically modifying the chemical structure of orexin-2 receptor agonists through various substitutions at defined positions (R1-R20) with different functional groups, cyclic structures, and molecular weights. These structural parameter changes aim to optimize the balance between receptor activity, brain permeability, and safety profile by tuning molecular properties such as lipophilicity, hydrogen bonding capacity, and steric characteristics.
Solution Approach 2:
The invention employs composite molecular structures combining multiple functional moieties within a single agonist molecule. The compounds integrate diverse structural elements including aromatic rings, heterocyclic systems, aliphatic chains, and polar groups in specific arrangements to create composite molecules that simultaneously achieve high receptor affinity, appropriate pharmacokinetic properties, and improved safety compared to simpler analogs.
2Ease of manufacture
If compound structure is simplified for easier synthesis, then manufacturing ease is improved, but activity and brain permeability may be compromised
Solution Approach 1:
The patent applies segmentation by dividing the complex agonist molecule into distinct modular components or building blocks that can be synthesized separately and then assembled. The molecular structure is conceptually divided into regions with specific functions (e.g., hydrophobic domains for membrane permeability, polar regions for receptor interaction), allowing independent optimization and simplifying the overall synthesis strategy while maintaining high activity and brain permeability.
Data Source
AI summary
The present invention provides compounds of formula (I) useful for the treatment of narcolepsy or cataplexy in a subject in need thereof. Related pharmaceutical compositions and methods are also provided herein.