How is 1-[(4-Amino-2-propyl-5-pyrimidinyl)methyl]-2-methylpyridinium chloride (CAS: 121-25-5) typically synthesized?

1-[(4-Amino-2-propyl-5-pyrimidinyl)methyl]-2-methylpyridinium chloride (CAS: 121-25-5) is typically synthesized via a multi-step process involving the coupling of a pyrimidine derivative with a 2-methylpyridinium ion. Commonly, this involves the use of a base like sodium hydride and a coupling reagent such as HATU. The reaction yields a highly functionalized compound with good selectivity and moderate to high yields.