Chemical Identity and Structure

4,6-Dimethyl-2-(methylsulfonyl)pyrimidine (Aladdin SKU: D155140) is a substituted pyrimidine derivative with the molecular formula C₇H₁₀N₂O₂S and a molecular weight of approximately 186.23 g/mol. The compound features a six-membered aromatic diazine ring substituted with methyl groups at the 4- and 6-positions and a methylsulfonyl (–SO₂CH₃) group at the 2-position.

The methylsulfonyl moiety is a powerful electron-withdrawing group that strongly activates the pyrimidine ring toward nucleophilic aromatic substitution (S_NAr). Because the sulfone acts as a leaving group, the 2-position is highly electrophilic, making this compound a privileged synthetic handle for the construction of diverse 2-aminopyrimidine, 2-alkoxypyrimidine, and related scaffolds commonly encountered in drug discovery and agrochemical programs.

Laboratory Handling and Safety

Although specific GHS classification data for this compound should be verified against the current Safety Data Sheet (SDS) provided by Aladdin Scientific, general precautions applicable to sulfonylpyrimidine reagents include the following:

• Personal protective equipment (PPE): Wear appropriate chemical-resistant gloves (e.g., nitrile), safety glasses or goggles, and a laboratory coat at all times when handling this compound.
• Ventilation: Handle in a well-ventilated fume hood to minimize inhalation exposure to dust or vapors.
• Skin and eye contact: Avoid direct contact. In case of skin or eye exposure, flush immediately with copious amounts of water for at least 15 minutes and seek medical attention.
• Ingestion/inhalation: Do not eat, drink, or smoke in areas where the compound is used. If inhaled, move the affected person to fresh air immediately.

Always consult the current SDS before first use. Specific hazard classifications (GHS pictograms, H-statements, P-statements) must be verified from the official product SDS.

Storage and Stability

Proper storage of 4,6-Dimethyl-2-(methylsulfonyl)pyrimidine is essential to maintain reagent integrity and reproducibility of experimental results. The following guidelines reflect best practices for sulfonylpyrimidine compounds; exact recommended conditions should be confirmed with the Aladdin SDS or product label:

• Temperature: Store at room temperature or under refrigeration (2–8 °C) in a tightly sealed container, away from heat sources and direct sunlight. Confirm exact temperature requirements from the product label.
• Container: Keep in the original, tightly closed container under an inert atmosphere (nitrogen or argon) if moisture sensitivity is suspected.
• Segregation: Store away from strong oxidizing agents, strong acids, and strong bases.
• Shelf life: Specific shelf-life data should be referenced from the Certificate of Analysis (CoA) supplied with each lot. Inspect reagent for discoloration or caking before use.

Applications in Synthesis

4,6-Dimethyl-2-(methylsulfonyl)pyrimidine is a broadly used synthetic intermediate owing to the excellent leaving-group ability of the sulfonyl moiety under nucleophilic aromatic substitution (S_NAr) conditions. Key applications include:

• 2-Aminopyrimidine synthesis: Primary and secondary amines react selectively at the 2-position under mild conditions, displacing the methylsulfonyl group to afford 2-amino-4,6-dimethylpyrimidines. This transformation is central to the preparation of kinase inhibitor scaffolds and other pharmacologically active molecules.
• 2-Alkoxy and 2-thioether pyrimidines: Alkoxides and thiolates can similarly displace the sulfonyl leaving group, providing access to diverse 2-substituted pyrimidine libraries.
• Fragment-based drug discovery: The compound's compact, drug-like pyrimidine core and its synthetic versatility make it attractive as a fragment or linker element in medicinal chemistry programs.
• Agrochemical synthesis: Activated pyrimidines are key building blocks in the preparation of herbicides, fungicides, and insecticides.

Reaction yields, temperatures, and solvent systems should be optimized empirically for each specific nucleophile and application. Always consult primary literature for validated protocols.

Quality and Ordering Information

Aladdin Scientific supplies 4,6-Dimethyl-2-(methylsulfonyl)pyrimidine under SKU D155140. When ordering and using this reagent, consider the following:

• Purity: Verify the purity specification on the product page and the Certificate of Analysis (CoA) provided with each shipment. Purity grade affects reaction yields and downstream analytical results.
• Lot-to-lot consistency: Request CoA documentation including HPLC purity, NMR confirmation, and melting point (where applicable) for quality assurance.
• Quantity: Select an appropriate pack size based on your projected consumption. Avoid repeated opening of large containers to minimize moisture or oxidant exposure.
• Returns and replacements: Contact Aladdin Scientific customer service if the reagent does not meet stated specifications upon receipt. Refer to Aladdin's returns and refunds policy for procedures.