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Description
Ethyl Hex-3-enoate is an unsaturated aliphatic ester built from a hexenoic acid chain carrying a double bond at the third position, with an ethyl ester group at the carboxyl terminus. In the laboratory this compound plays a dual role: it serves as a raw material for organic synthesis, classified as a non-heterocyclic building block, and it also functions as a reference compound in aroma analysis. The combination of an ester group reactive toward both hydrolysis and transesterification with a double bond available for further functionalisation makes it a practical starting point for constructing medium-chain target molecules, particularly in flavour and fragrance chemistry research.
The principal characteristic that leads researchers to select this material is the presence of two complementary centres of reactivity within a single small molecule. Its internal double bond is open to hydrogenation, epoxidation, dihydroxylation, hydroformylation, and olefin metathesis, while the ester group is readily converted into an alcohol, an amide, or a carboxylic acid through reduction, aminolysis, and saponification respectively. Because the material is a liquid at room temperature, volumetric measurement is straightforward and mixing with common organic solvents presents no difficulty. As a TCI product, consistency of quality between batches supports reproducible experimental work.
In Indonesian laboratories, this ester is typically encountered in university and institutional organic synthesis groups, in flavour and fragrance development work, and in analytical laboratories that require a comparison compound when profiling aroma constituents. Its liquid form suits routine bench-scale preparations where small volumes are dispensed by syringe or micropipette. Research teams working on medium-chain intermediates generally hold it as a standing item alongside other non-heterocyclic building blocks, drawing on it whenever an ester bearing an internal alkene is required.
Laboratory Applications
- Organic synthesis building block: the molecule provides an ester terminus and an internal alkene in one compact structure, giving synthetic chemists two independent handles for assembling medium-chain target compounds.
- Aroma and flavour analysis: it serves as a comparison compound during the profiling of volatile constituents, allowing analysts to relate observed signals to a known unsaturated ester reference material.
- Alkene functionalisation studies: the internal double bond accepts hydrogenation, epoxidation, dihydroxylation, and hydroformylation, making the compound a convenient substrate for teaching and developing these transformations.
- Olefin metathesis chemistry: the accessible internal double bond makes this ester a suitable partner in metathesis reactions where chain length and ester functionality must both be retained.
- Ester derivatisation work: reduction, aminolysis, and saponification convert the ethyl ester cleanly into alcohols, amides, or carboxylic acids for downstream steps in multi-stage synthetic routes.
Specifications
- Brand: TCI
- CAS number: 2396-83-0
- Category: Chemistry > Building Blocks > Non-Heterocyclic Building Blocks
- Physical form: liquid at room temperature
- Pack sizes: available in standard TCI catalogue pack sizes; please confirm the specific packaging option when ordering
- Storage: keep in a tightly closed container, in a cool and well-ventilated place away from ignition sources
Handling and Storage
Store the container tightly closed in a cool, dry, and well-ventilated area, away from heat, open flames, and other sources of ignition. Original manufacturer packaging or chemically compatible glass bottles with sealing caps are preferred, since a closed system limits evaporative loss and exposure to atmospheric moisture that could promote hydrolysis of the ester group. Handle the material inside a fume hood, wear safety glasses, nitrile gloves, and a laboratory coat, and avoid inhaling vapours or allowing contact with skin and eyes. Dispense volumetrically using clean, dry glassware, close the container immediately after use, and consult the manufacturer's safety data sheet before beginning work.
