How is 7-Methylpyrazolo[1,5-a]pyrimidine-3-carboxylic acid (CAS: 1016505-59-1) typically synthesized?

7-Methylpyrazolo[1,5-a]pyrimidine-3-carboxylic acid can be synthesized by the condensation of 7-methylpyrazolo[1,5-a]pyrimidin-3-one with an appropriate carboxylic acid. This reaction typically involves the use of a catalytic amount of an acid or base to promote the formation of the amide bond. The yield is usually around 70-80%, and the reaction is selective for the formation of the desired amide product.