Enantioselective Synthesis of Cuparane Sesquiterpenes. Synthesis of (−)-Cuparene and (−)-δ-Cuparenol

(−)-Cuparene and (−)-δ-cuparenol, two cuparane-type sesquiterpenoids, were synthesized from β-cyclogeraniol in 47% and 27% overall yield, respectively, using a Katsuki−Sharpless asymmetric epoxidat...