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Description
5-(4-Fluorophenyl)isoxazole-3-carboxylic acid is a synthetic organic compound belonging to the family of chemical building blocks, specifically an isoxazole derivative carrying a fluorophenyl substituent. In the chemistry laboratory, it serves as a valuable intermediate for constructing more complex molecules, particularly in the synthesis of pharmaceuticals, agrochemicals, and biologically active substances. The isoxazole ring is a heterocyclic framework widely encountered in bioactive compounds, and this scaffold makes the compound a practical starting point for medicinal and synthetic chemistry work. Researchers use it as the initial reactant in a range of transformations, giving the laboratory a versatile platform for generating new candidate structures.
The main strength of this compound lies in the combination of a stable isoxazole ring and an electronically active fluorophenyl group. The presence of the fluorine atom at the para position of the phenyl ring influences the electron distribution across the molecule, making its reactivity in various chemical transformations more predictable and easier to control. This fluorine atom also imparts characteristic lipophilic and metabolic properties to the molecule, which are frequently exploited when designing compounds intended to interact with biological systems. As a result, the compound offers chemists a dependable balance of stability and tunable reactivity, making it a preferred choice for building libraries of analogues and for systematic structure–activity studies.
In Indonesian research laboratories, this building block is typically applied in medicinal chemistry and organic synthesis projects, where it is used as a starting point for amidation, esterification, or carbon–nitrogen bond-forming reactions aimed at producing new compound candidates. Academic groups and industrial research facilities alike can employ it to introduce a fluorinated isoxazole motif into target molecules, supporting the development of drug candidates, agrochemical actives, and other bioactive materials. Because the compound is supplied under the recognized TCI brand, laboratories can rely on consistent material identity for reproducible experiments and straightforward documentation of their synthetic work.
Laboratory Applications
- Medicinal chemistry scaffold assembly: this building block is used to introduce a fluorinated isoxazole core into drug-like molecules, supporting the synthesis of novel pharmaceutical candidates with predictable reactivity.
- Agrochemical intermediate preparation: the carboxylic acid group enables straightforward amidation and esterification, allowing researchers to generate derivatives for crop-protection and bioactive compound development programs.
- Carbon–nitrogen bond-forming reactions: the isoxazole framework and reactive carboxylic acid make the compound a reliable substrate for coupling and condensation steps in multi-step organic synthesis.
- Structure–activity relationship studies: the para-fluorophenyl substituent modulates electron distribution, letting chemists systematically vary analogues and examine how fluorination affects biological and physicochemical properties.
- Fluorinated building block library expansion: as a member of the fluorinated building blocks category, this compound helps laboratories enrich their collections of fluorinated intermediates for diverse synthetic applications.
Specifications
- Product name: 5-(4-Fluorophenyl)isoxazole-3-carboxylic acid (TCI F1428)
- Brand: TCI
- CAS number: 33282-24-5
- Category: Chemistry > Building Blocks > Fluorinated Building Blocks
- Pack sizes: standard laboratory pack sizes from the TCI product range
- Physical form and storage: physical form as supplied by the manufacturer; store in a tightly closed container under standard laboratory conditions
Handling and Storage
Store the compound in a tightly closed container, protected from moisture and direct sunlight, in a cool, dry, and well-ventilated laboratory area. Keep it away from sources of heat, open flames, and incompatible materials such as strong oxidizing agents. Use appropriate personal protective equipment, including laboratory gloves, safety goggles, and a laboratory coat, when handling the substance. Work in a fume hood or adequately ventilated area to minimize inhalation of dust or vapors. Avoid contact with skin and eyes, and wash hands thoroughly after handling. Follow standard laboratory practices for chemical waste disposal, and consult the safety data sheet supplied with the product for detailed information before first use.
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