3-Hydroxy-4-methoxybenzaldehyde acts as a precursor for the stereoselective synthesis of the anticancer drug (Z)-combretastatin A-4 and glycitein. It also used as an important raw material for the preparation of morphine. Further, it is involved in the preparation of Schiff- bases by reacting with furan-2-carboxylic acid hydrazide and thiophene-2-carboxylic acid hydrazide. In addition to this, it is used to prepare (Z)-2-(3-hydroxy-4-methoxybenzylidene)-1-azabicyclo[2.2.2]octan-3-one by reacting with with1-azabicyclo[2.2.2]octan-3-one.
