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Description
2-Chloro-6-methylbenzothiazole is a heterocyclic compound that combines a benzothiazole framework with a chlorine atom at the 2-position and a methyl group at the 6-position. The benzothiazole scaffold itself is a motif frequently encountered in biologically active molecules, dyes, and functional materials, which is why this compound is widely positioned as a building block in organic synthesis. In the laboratory, its role is to provide a pre-formed heterocyclic core together with a reactive site ready for further functionalization, allowing researchers to eliminate several synthetic steps and focus directly on constructing the target structure.
The key property that makes this compound a preferred choice is the reactivity of the chlorine atom at the 2-position of the thiazole ring. That position is electron-deficient because it is flanked by nitrogen and sulfur atoms, making the chlorine an excellent leaving group in nucleophilic aromatic substitution reactions. A wide range of nucleophiles, including amines, alcohols, thiols, and heterocyclic anions, can be introduced at that position under relatively mild conditions. The methyl group on the benzene ring provides a modest electron-donating effect and simultaneously serves as a structural marker that assists in confirming substitution patterns during analytical characterization.
In Indonesian laboratories, this reagent is typically employed by medicinal chemistry and materials science research groups working on drug discovery programs, agrochemical development, and advanced organic materials. Universities, government research institutions, and private pharmaceutical companies across the country source this building block to accelerate the synthesis of novel heterocyclic candidates. Its availability through established local distribution channels ensures that Indonesian researchers can access it reliably without lengthy international procurement cycles.
Laboratory Applications
Nucleophilic aromatic substitution: the electron-deficient 2-position allows amines, thiols, and alkoxides to displace chlorine under mild conditions, streamlining library synthesis.
Medicinal chemistry building block: the benzothiazole core is prevalent in bioactive scaffolds, making this compound a practical starting point for drug candidate elaboration.
Dye and pigment intermediate: benzothiazole derivatives are key chromophore components, and this compound provides a functionalizable platform for synthesizing specialized colorants.
Cross-coupling precursor: the carbon-chlorine bond at the 2-position can participate in palladium-catalyzed coupling reactions to extend molecular complexity efficiently.
Agrochemical research intermediate: the benzothiazole motif appears in several crop-protection agents, and this building block supports rapid analog generation for structure-activity studies.
Specifications
Brand: TCI (Tokyo Chemical Industry)
CAS Number: 3507-26-4
Product Code: C3160
Category: Chemistry > Building Blocks > Heterocyclic Building Blocks
Physical Form: Solid
Storage: Store in a tightly closed container in a cool, dry place away from light
Handling and Storage
2-Chloro-6-methylbenzothiazole should be stored in its original tightly sealed container, kept in a cool and dry environment away from direct sunlight and sources of heat. Suitable storage containers include amber glass bottles or high-density polyethylene vessels that prevent moisture ingress and light exposure. Standard laboratory precautions should be observed when handling this compound, including the use of appropriate personal protective equipment such as gloves, safety goggles, and a lab coat. All manipulations involving weighing or transfer of the material should be carried out in a well-ventilated area or inside a fume hood to minimize inhalation exposure. Avoid contact with skin and eyes, and ensure that waste is disposed of in accordance with institutional chemical waste management protocols.
