How is 4-Formyl-3-methoxybenzonitrile (CAS: 21962-45-8) typically synthesized?

4-Formyl-3-methoxybenzonitrile (CAS: 21962-45-8) can be synthesized through a series of mild reactions, starting from 3-methoxybenzonitrile. Typical synthesis involves the formylation of the hydroxyl group using a formylating agent like formic acid, followed by purification. The reaction is typically performed under mild conditions and may require the use of a catalyst to improve yield and selectivity.