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4-bromopyrimidin-2-amine; CAS No.: 343926-69-2; 4-Bromopyrimidin-2-amine represents our halogenated pyrimidine building blocks essential for nucleoside analog development. The C4 bromine and C2 amine allow sequential functionalization via cross-coupling and substitution reactions. Operating as a worldwide chemical supplier, we provide GMP-grade batches for preclinical candidate production. This electron-deficient aromatic system facilitates SNAr reactions while maintaining DNA base-pairing mimicry. Our synthesis protocols control regioselectivity in bromination reactions, crucial for maintaining positional isomer purity in high-throughput screening libraries.