How is Kobusin (CAS: 36150-23-9) typically synthesized?

Kobusin is synthesized via a multistep process involving the conversion of a suitable precursor to the target compound through a series of reactions. Commonly, the synthesis involves alkylation, followed by ring closure and subsequent functional group modifications. The process requires the use of catalysts such as Lewis acids and is typically performed under anhydrous conditions to achieve high selectivity and yield.