Synthesis of three 18F-labelled cyclooxygenase-2 (COX-2) inhibitors based on a pyrimidine scaffold
| Autor: | Sai Kiran Sharma, Jatinder Kaur, Frank Wuest, Alison Marshall, Melinda Wuest, Ole Tietz, Jenilee Way |
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| Rok vydání: | 2013 |
| Předmět: |
Models
Molecular Gene isoform Fluorine Radioisotopes Pyrimidine Stereochemistry Biochemistry Structure-Activity Relationship chemistry.chemical_compound Nucleophilic aromatic substitution medicine Animals Humans Physical and Theoretical Chemistry chemistry.chemical_classification Sheep Cyclooxygenase 2 Inhibitors Dose-Response Relationship Drug Molecular Structure biology Organic Chemistry Cancer medicine.disease Recombinant Proteins In vitro Pyrimidines Enzyme chemistry Cyclooxygenase 2 Cyclooxygenase 1 biology.protein Arachidonic acid Cyclooxygenase |
| Zdroj: | Organic & Biomolecular Chemistry. 11:8052 |
| ISSN: | 1477-0539 1477-0520 |
| DOI: | 10.1039/c3ob41935e |
| Popis: | Cyclooxygenase (COX) is the key enzyme within the complex conversion of arachidonic acid into prostaglandins (PGs). Inhibitors of this enzyme represent a particularly promising class of compounds for chemoprevention and cancer therapy. The experimental data on the involvement of COX isoform COX-2 in tumour development and progression, as well as the observed overexpression of COX-2 in a variety of human cancers provide the rationale for targeting COX-2 for molecular imaging and therapy of cancer. A series of trifluoromethyl-substituted pyrimidines was prepared as a novel class of selective COX-2 inhibitors, based on the lead structure 1a. All compounds were tested in cyclooxygenase (COX) assays in vitro to determine COX-1 and COX-2 inhibitory potency and selectivity. Molecular docking studies using the catalytic site of COX-1 and COX-2, respectively, provided complementary theoretical support for the obtained experimental biological structure–activity relationship data of three highly potent and selective fluorobenzyl-containing COX-2 inhibitors. Selected fluorobenzyl-substituted pyrimidine derivatives were further developed as (18)F-labelled radiotracers ([(18)F]1a, [(18)F]2a, [(18)F]3a). Radiotracers [(18)F]1a and [(18)F]2a were radiolabelled using 4-[(18)F]fluorobenzylamine ([(18)F]FBA) as a building block. Radiotracer [(18)F]3a was radiofluorinated directly using a nucleophilic aromatic substitution reaction with no-carrier-added (n.c.a.) [(18)F]fluoride on an iodylaryl compound as a labelling precursor. |
| Databáze: | OpenAIRE |
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