Are there alternatives to 4-amino-2-methylsulfanyl-pyrimidine-5-carbaldehyde (CAS: 770-31-0) in synthesis?

While 4-amino-2-methylsulfanyl-pyrimidine-5-carbaldehyde is a valuable intermediate in organic synthesis, alternatives may include related compounds like 2-(aminomethyl)-5-chloropyrimidine or 2-amino-4-chloropyrimidine. These alternatives may offer similar functional groups but with different reactivity. Other substitutes could be isomers or analogs, such as 4-amino-pyrimidine-5-carbaldehyde, which can serve as useful equivalents in certain synthetic routes.