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Description
TCI C3019 Cyclopentanecarboxaldehyde (stabilized with HQ) is a cyclic aliphatic aldehyde that carries a formyl group attached directly to a cyclopentane ring, and it is supplied in a stabilized state with hydroquinone (HQ) added as an oxidation inhibitor. In organic synthesis laboratories, this compound serves as a non-heterocyclic building block that provides a reactive carbonyl centre together with a rigid five-membered ring framework. That combination is frequently exploited to introduce conformational rigidity and controlled lipophilicity into target molecules, particularly in medicinal chemistry research and laboratory-scale development of bioactive compounds.
The property that makes this reagent a widely preferred choice is the characteristic reactivity of the aldehyde group: it readily undergoes nucleophilic addition, reductive amination, aldol condensation, Wittig olefination, and multicomponent reactions. Because aliphatic aldehydes tend to be susceptible to oxidation into the corresponding carboxylic acid and to polymer formation during storage, the addition of hydroquinone represents a practical advantage that helps maintain material quality throughout the working life of the container. Its liquid form also makes volumetric measurement with a micropipette or syringe straightforward, which supports accurate dosing in small-scale reactions.
In Indonesian laboratories, this building block is typically used in university research groups, organic and medicinal chemistry teaching laboratories, and institutional research units that carry out laboratory-scale synthesis. It suits workflows where a compact alicyclic fragment must be attached to a larger scaffold, and where researchers require a reagent that stays usable across an extended experimental campaign rather than a single reaction. The stabilized presentation is helpful in settings where reagents are stored between infrequent synthetic runs.
Laboratory Applications
Reductive amination — the aldehyde reacts with primary or secondary amines to form imine intermediates that are reduced to amines, installing a cyclopentyl fragment onto nitrogen-containing scaffolds.
Wittig olefination — the reactive carbonyl couples cleanly with phosphorus ylides, allowing researchers to convert the aldehyde into defined alkenes bearing the rigid cyclopentane ring.
Aldol condensation — the compound acts as the electrophilic carbonyl partner in carbon–carbon bond forming reactions used to build extended chains from a compact alicyclic starting point.
Multicomponent reactions — the aldehyde functions as the carbonyl input in one-pot procedures, an efficient route to structurally diverse libraries for laboratory-scale medicinal chemistry screening.
Nucleophilic addition chemistry — organometallic and other nucleophiles add directly to the formyl group, giving secondary alcohols that carry conformational rigidity and controlled lipophilicity.
Specifications
Brand: TCI
CAS number: 872-53-7
Category: Chemistry > Building Blocks > Non-Heterocyclic Building Blocks
Product code: C3019
Physical form: liquid
Stabilizer: hydroquinone (HQ), added as an oxidation inhibitor
Storage note: keep the container tightly closed and store as indicated on the manufacturer's label and safety data sheet
Handling and Storage
Store the container tightly closed in a cool, well-ventilated area away from heat, ignition sources, and strong oxidizing agents, following the storage conditions stated on the manufacturer's label and safety data sheet. Keep the material in its original supplied container, which is designed to retain the hydroquinone stabilizer and limit exposure to air. Handle in a fume hood using standard personal protective equipment, including safety glasses, chemical-resistant gloves, and a laboratory coat. Because aliphatic aldehydes are prone to oxidation and polymer formation, minimise headspace exposure, close the container promptly after dispensing with a syringe or micropipette, and record the date of first opening so material quality can be tracked throughout its working life.
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