Concise Synthesis of Yashabushidiol A and (±)‐Diospongin A

Abstract Synthesis of (±)‐diospongin A has been achieved from the (2 SR ,4 RS )‐pentane‐1,2,4,5‐tetraol in six steps. An intermediate has also been converted into yashabushidiol A. This work features a desymmetric cyclization and reduction of a meso ‐1,7‐diarylheptanoid precursor to furnish the desired cis ‐2,6‐disubstituted tetrahydropyran.