Pyrimidine Compound Structure for Broad Seizure Control
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Solution Overview
Problem
Existing antiepileptic drugs often disrupt neuronal activity balance at higher doses, leading to motor dysfunction and uncontrolled seizures, and there is a lack of compounds with a pyrimidine structure linking the 5-position carbon to the 1-position nitrogen of a uracil skeleton for treating epileptic seizures effectively.
Innovation Solution
Development of a novel pyrimidine compound with specific structural modifications, including phenyl, naphthyl, or pyridyl rings, and functional groups like halogen, lower alkynyl, and -O-lower alkyl, which can maintain neuronal excitation/inhibition balance and treat various types of seizures, including those resistant to conventional drugs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing antiepileptic drugs are used at higher doses to suppress seizures, then seizure control improves, but motor dysfunction and epileptic seizure are induced due to disturbed neuronal activity equilibrium
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of antiepileptic compounds through specific substitutions at the 5-position of the pyrimidine ring (aromatic groups, heterocyclic groups, or alkyl groups with specific electron-withdrawing substituents). These structural parameter changes result in compounds that can control seizures at lower doses without causing motor dysfunction, thus resolving the contradiction between seizure control and harmful side effects.
2Reliability
If existing antiepileptic drugs are used to control seizures, then some seizure types are suppressed, but treatment spectrum is limited and 30% of patients cannot adequately control their seizure
Solution Approach 1:
The patent applies universality by designing pyrimidine compounds with specific structural features (substitutions at the 5-position with aromatic groups, heterocyclic groups, or alkyl groups containing electron-withdrawing substituents) that enable the compounds to effectively treat multiple types of seizures including Dravet syndrome, Lennox-Gastaut syndrome, and other refractory epilepsy types. This multi-functional design expands the treatment spectrum beyond what existing drugs can achieve.
3Object-generated harmful factors
If conventional antiepileptic drugs are administered, then motor dysfunction is avoided, but seizure control is insufficient and patients remain anxious about uncontrolled seizure
Solution Approach 1:
The patent applies parameter changes by optimizing the chemical structure of pyrimidine compounds through specific substitutions at the 5-position (aromatic groups, heterocyclic groups, or alkyl groups with electron-withdrawing substituents like cyano, nitro, or halogen groups). These structural modifications enable the compounds to achieve effective seizure control at lower doses, maintaining neuronal activity equilibrium while providing superior seizure protection compared to conventional drugs.
Data Source
AI summary
The present invention provides a novel pyrimidine compound represented by Formula [I] and a salt thereof:[in the formula, the symbols are as defined in the specification], which is useful for treating, preventing and/or diagnosing seizure and the like in disease involving epileptic seizure or convulsive seizure (including multiple drug resistant seizure, refractory seizure, acute symptomatic seizure, febrile seizure and status epilepticus), as well as a medical use therefor.