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Description
TCI D3699 4,6-Dimethyl-2-(methylsulfonyl)pyrimidine is a heterocyclic compound built on a pyrimidine ring that carries two methyl groups at the 4- and 6-positions and one methylsulfonyl group at the 2-position. In the organic synthesis laboratory, this compound serves as a highly practical heterocyclic building block, because the methylsulfonyl group sitting between the two ring nitrogen atoms is an excellent leaving group. Its role is to supply a ready-to-use pyrimidine ring that can be coupled directly with amines, alcohols, thiols, or other nucleophiles, so that researchers do not have to construct the heterocyclic ring from scratch.
The main property that makes this material a preferred choice is its reactivity in nucleophilic aromatic substitution reactions. The pyrimidine ring is electron-poor, and the presence of the electron-withdrawing sulfonyl group further activates the 2-position toward nucleophilic attack. The methanesulfinate group that is displaced is easily separated during the final work-up stage, so purification of the product remains relatively straightforward. The two methyl groups at the 4- and 6-positions provide stability and direct the reaction to a single position, so high selectivity can be achieved without the need for protecting groups.
In Indonesian laboratories, this building block is typically used in university research groups, pharmaceutical and agrochemical discovery programmes, and contract synthesis work where substituted pyrimidine scaffolds are required. It fits routine bench-scale procedures in synthetic organic chemistry laboratories, allowing analogue libraries to be prepared quickly from a common intermediate. Because the ring system is already assembled, laboratories with limited time and reagent inventories can reach target structures in fewer synthetic steps.
Laboratory Applications
- Nucleophilic aromatic substitution with amines: the activated 2-position reacts cleanly with primary and secondary amines to give 2-aminopyrimidines without building the ring.
- Synthesis of 2-alkoxy and 2-aryloxy pyrimidines: alcohols and phenoxides displace the methylsulfonyl group directly, giving ether-linked pyrimidine derivatives in a single coupling step.
- Preparation of 2-thioether pyrimidines: thiols act as strong nucleophiles at the electron-poor 2-position, making sulfur-linked pyrimidine analogues straightforward to access.
- Medicinal chemistry scaffold elaboration: the ready-made dimethylpyrimidine core lets researchers append diverse nucleophiles and rapidly generate analogue series from one common intermediate.
- Teaching and method development in heterocyclic chemistry: its predictable single-site selectivity makes it a reliable substrate for demonstrating and optimising substitution reaction conditions.
Specifications
- Brand: TCI (Tokyo Chemical Industry)
- CAS number: 35144-22-0
- Catalogue number: D3699
- Chemical name: 4,6-Dimethyl-2-(methylsulfonyl)pyrimidine
- Category: Chemistry > Building Blocks > Heterocyclic Building Blocks
- Pack sizes: available in standard TCI research-scale packaging; please confirm the pack size options when ordering
- Storage: store in a tightly closed container in a cool, dry, well-ventilated place
Handling and Storage
Store the container tightly closed in a cool, dry and well-ventilated area, away from direct sunlight, moisture, heat sources, and incompatible materials such as strong bases and strong oxidising agents. Keep the material in its original supplier container or in a chemically resistant, clearly labelled amber glass or approved plastic container, and reseal it promptly after each use to limit moisture uptake. Handle the compound in a fume hood using standard laboratory personal protective equipment, including safety goggles, a laboratory coat, and suitable chemical-resistant gloves. Avoid inhalation of dust and direct contact with skin and eyes. Dispose of residues and contaminated materials in accordance with institutional chemical waste procedures, and always consult the manufacturer's safety data sheet before use.
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