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5-bromo-4-chloro-2-(methylsulfonyl)pyrimidine; CAS No.: 79091-24-0; ChemShuttle offers 5-bromo-4-chloro-2-(methylsulfonyl)pyrimidine for sequential displacement reactions. The sulfone group facilitates SNAr reactions, while the halogens enable regioselective functionalization. Our process development minimizes di-substituted byproducts through optimized reaction stoichiometry.