How is 2-Fluoro-4-methoxyphenylacetic acid (CAS: 883531-28-0) typically synthesized?

2-Fluoro-4-methoxyphenylacetic acid can be synthesized through a multi-step process involving the protection of the hydroxyl group, fluoroalkylation, and deprotection of the acetylation. A common approach involves the reaction of 4-methoxyphenylacetic acid with a fluoroalkylating agent in the presence of a base. The yield is typically around 70-80%, and the reaction is catalyzed by a suitable base such as sodium hydride or potassium tert-butoxide.