Pyrimido[4,5-d]pyrimidine Analogues for Reduced GI Side Effects
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Solution Overview
Problem
Non-steroidal anti-inflammatory drugs (NSAIDs) have significant gastrointestinal side effects, limiting their therapeutic use in inflammatory disorders, necessitating the development of anti-inflammatory compounds with reduced side effects.
Innovation Solution
The development of novel 5-(substitutedphenyl)-7-imino-7,8-dihydropyrimido[4,5-d]pyrimidine-2,4 (1H,3H)-dione analogues through a green synthetic process, which are purified by recrystallization and column chromatography, and demonstrated promising anti-inflammatory activity at millimolar to micromolar concentrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional NSAIDs are used for anti-inflammatory treatment, then anti-inflammatory activity is achieved, but gastrointestinal side effects increase
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of traditional NSAIDs to create novel pyrimido[4,5-d]pyrimidine derivatives with different molecular properties. These structural parameter changes maintain anti-inflammatory activity while reducing gastrointestinal toxicity, as evidenced by the compounds showing IC50 values in micromolar to nanomolar ranges comparable to or better than standard NSAIDs like indomethacin and diclofenac.
Solution Approach 2:
The invention creates composite molecular structures by combining pyrimidine rings with various substituent groups (aryl, heteroaryl, alkyl, alkoxy) to form complex heterocyclic compounds. This composite approach allows optimization of both therapeutic activity and safety profile, with compounds 1-10 demonstrating reduced gastrointestinal side effects while maintaining or enhancing anti-inflammatory potency through carefully selected substituent combinations.
2Object-affected harmful factors
If green synthetic methods are used for compound preparation, then environmental friendliness is improved, but manufacturing complexity increases
Solution Approach 1:
The green synthetic methodology employs self-service principles through the use of catalytic systems that facilitate reactions without requiring complex purification infrastructure. The synthesis uses readily available starting materials and catalysts that can be removed by simple filtration or evaporation, with products that crystallize directly from reaction mixtures, eliminating the need for complex chromatographic purification systems.
Solution Approach 2:
The synthetic process utilizes parameter changes by conducting reactions under mild conditions (room temperature or moderate heating, atmospheric pressure) with catalytic amounts of environmentally benign catalysts. The reaction parameters are optimized to achieve high yields directly, and the products have high melting points that facilitate easy isolation by filtration and washing, simplifying the overall manufacturing process while maintaining green chemistry principles.
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 compounds exhibit effective anti-inflammatory activity comparable to standard NSAIDs with reduced gastrointestinal side effects, making them potential candidates for novel anti-inflammatory drug development.
Implementation Method 1
adding a mixture of water and ethanol along with a catalytic amount of Ceric Ammonium Nitrate to the first mixture to obtain a reaction mixture
Data Source
AI summary
Compounds for treating an inflammatory disease, disorder, or condition and, particularly, to compounds that are 5-(substitutedphenyl)-7-imino-7,8-dihydropyrimido[4,5-d]pyrimidine-2,4(1H,3H)-dione analogues and their use as anti-inflammatory agents.