How is 5-Hydroxy-2-(3-hydroxy-4-methoxyphenyl)-6,7-dimethoxy-4H-chromen-4-one (CAS: 855-96-9) typically synthesized?

5-Hydroxy-2-(3-hydroxy-4-methoxyphenyl)-6,7-dimethoxy-4H-chromen-4-one can be synthesized via a multi-step process involving the condensation of 3-hydroxy-4-methoxyphenol with an appropriate chromone derivative. Commonly, this is achieved using an esterification followed by a coupling reaction. The reaction typically requires a base like sodium hydroxide and is conducted in an aqueous-organic solvent mixture. Yield and selectivity are generally good, and the method is reproducible under standard conditions.