Are there alternatives to 2-Hydroxy-4-quinolinecarboxylic acid (CAS: 84906-81-0) in synthesis?

While 2-Hydroxy-4-quinolinecarboxylic acid (CAS: 84906-81-0) is a key compound for certain applications, alternatives such as other quinoline carboxylic acids or their derivatives can be used depending on the specific requirements of the synthesis. Isomers and analogs can also serve as viable substitutes. Common alternatives include 4-Methoxyquinoline-2-carboxylic acid and 4-Chloroquinoline-2-carboxylic acid, which offer similar functionalities with varying reactivity and selectivity.