How is 28-Demethyl-β-amyrone (CAS: 73493-60-4) typically synthesized?

28-Demethyl-β-amyrone is typically synthesized through a series of steps involving chemical transformations. A common approach involves the oxidation of 28-deacetylbetulinic acid with a suitable oxidizing agent like hydrogen peroxide in the presence of a catalyst such as potassium permanganate. The reaction yields 28-demethyl-β-amyrone with a high yield of up to 90%, although the exact yield and selectivity can vary based on reaction conditions.