Dihydroxerulin, 1, has been stereoselectively synthesized by a convergent approach in which a key step was the Wittig reaction between (Z)-5-[(E)-3-formyl-2-propenylidene]-5H-furan-2-one, 15, and the phosphoniumylid which derived from [(E)-2-decen-4,6-diyn-1-yl]triphenylphosphonium bromide, 19. Compound 19 was conveniently prepared by a short reaction sequence involving a Stille reaction between 1-trimethylstannyl-1