Related Experiment Video
Updated: Aug 11, 2026
10:10
Platelet Adhesion and Aggregation Under Flow using Microfluidic Flow Cells
Published on: October 27, 2009
Anti-platelet aggregation activity of some pyrazines
A Ohta1, H Takahashi, N Miyata
1Tokyo University of Pharmacy and Life Science, Japan.
Biological & Pharmaceutical Bulletin
|November 14, 1997
Summary
Researchers investigated pyrazines for anti-platelet activity. 2,3-bis(p-methoxyphenyl)pyrazine derivatives demonstrated significant inhibition of platelet aggregation, suggesting potential therapeutic applications.
Area of Science:
- Medicinal Chemistry
- Pharmacology
- Organic Synthesis
Background:
- Platelet aggregation is a key factor in thrombosis.
- Developing novel anti-platelet agents is crucial for cardiovascular disease management.
- Pyrazine derivatives represent a class of compounds with potential biological activities.
Purpose of the Study:
- To synthesize and evaluate the anti-platelet aggregation activity of various pyrazine derivatives.
- To identify specific structural features that enhance inhibitory effects on platelet aggregation.
Main Methods:
- Synthesis of 48 pyrazine compounds, including alkyl- and arylpyrazines.
- Systematic modification of phenyl group substituents in 2,3-diphenylpyrazine core.
- Assessment of anti-platelet aggregation activity using standard aggregometry assays.
Main Results:
- 2,3-diphenylpyrazines exhibited the most potent anti-platelet aggregation activity among initial compounds.
- Introduction of p-methoxyphenyl substituents led to derivatives with considerably strong inhibitory activity.
- Structure-activity relationship analysis indicated the importance of specific substitutions for efficacy.
Conclusions:
- Pyrazine derivatives, particularly 2,3-bis(p-methoxyphenyl)pyrazine analogs, are promising candidates for anti-platelet drug development.
- The study provides valuable insights into the design of novel anti-platelet agents based on the pyrazine scaffold.
Related Concept Videos
01:25Basicity of Heterocyclic Aromatic Amines
Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).
01:11Aryldiazonium Salts to Azo Dyes: Diazo Coupling
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para position.