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Description
TCI D4208, 3-(1,3-Dithian-2-ylidene)-2,4-pentanedione, is a synthetic reagent that joins a 1,3-dithiane ring to a conjugated diketone framework through an exocyclic double bond. Within the protection, deprotection, and derivatization reagent group, this compound serves both as a source of a ketene dithioacetal unit and as an intermediate carrying two active acetyl groups. Researchers turn to it when they need a stable protected carbonyl synthon, or when they want to introduce a double sulfur fragment into a target molecule in a controlled manner across a multi-step synthetic sequence.
The characteristic that makes this reagent attractive is its combination of stability and directed reactivity. The dithiane ring provides protection that withstands many basic and nucleophilic conditions, yet it can still be removed and returned to a carbonyl group at the desired stage using hydrolysis methods assisted by specific reagents. At the same time, the 2,4-pentanedione system conjugated with the exocyclic double bond makes the compound a conjugated electrophile that is ready to undergo addition as well as condensation reactions to form heterocyclic rings. The sulfur content is likewise useful where sulfur-containing structural motifs are part of the synthetic design.
In Indonesian laboratories, this reagent is typically used in university organic synthesis groups, in research institute laboratories working on heterocyclic chemistry, and in development laboratories that prepare compound libraries for screening. It suits work where a multi-step route requires a carbonyl group to be masked during earlier transformations and released later. Because it is supplied by TCI as a catalogued research reagent, it fits laboratories that require consistent, well-documented starting materials for reproducible synthetic work.
Laboratory Applications
- Carbonyl protection in multi-step synthesis: the dithiane ring masks a carbonyl group so that subsequent basic or nucleophilic steps can proceed without unwanted reaction at that position.
- Heterocyclic ring construction: the conjugated diketone system readily undergoes condensation with binucleophiles, giving researchers a direct route to sulfur-containing and other heterocyclic scaffolds.
- Ketene dithioacetal chemistry: the compound acts as a ready-made source of the ketene dithioacetal unit, saving the effort of generating this reactive fragment separately in the laboratory.
- Conjugate addition studies: the exocyclic double bond conjugated to two acetyl groups makes the molecule a defined electrophilic acceptor for investigating nucleophilic addition behaviour and selectivity.
- Introduction of sulfur motifs: the two ring sulfur atoms allow controlled installation of a double sulfur fragment into target molecules where sulfur-containing structural features are required.
Specifications
- Brand: TCI
- CAS Number: 55727-23-6
- Chemical name: 3-(1,3-Dithian-2-ylidene)-2,4-pentanedione
- Category: Chemistry > Synthetic Reagents > Protection, Deprotection, Derivatization
- Pack sizes: available in the catalogue pack sizes listed by TCI for this product code
- Storage: keep in a closed original container, away from heat and direct sunlight, in accordance with the manufacturer's instructions
Handling and Storage
Store the reagent in its tightly closed original container, in a cool, dry, and well-ventilated area away from heat sources, direct sunlight, and incompatible chemicals such as strong oxidising agents. Follow the storage temperature stated by the manufacturer on the label and safety data sheet. Handle the material inside a fume hood, since sulfur-containing compounds may release an unpleasant odour. Wear a laboratory coat, safety goggles, and chemically resistant gloves during weighing and transfer. Use clean, dry spatulas and glassware to avoid contamination and moisture uptake, close the container promptly after use, and label all secondary containers clearly. Dispose of residues and contaminated materials as chemical waste according to institutional procedures.
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