Scheme 1. Synthesis of taiwanin C. Reagents and conditions: (a) PPh₃, CBr₄ and CH₂Cl₂, rt; (b) n-BuLi and THF, −78 °C, then ClCO₂Me, −78 °C to rt; (c) K₂CO₃ and EtOH, rt; (d) triethyl phosphonoacetate, NaH and THF, 0 °C; (e) DIBAL-H and CH₂Cl₂, −78 °C; (f) DCC, DMAP and CH₂Cl₂, rt; (g) Ac₂O, mw, 140 °C; (h) DDQ and benzene, 80 °C.