Access to Optically Active Ipsdienol from Verbenone

Verbenone 1 or 2 is converted in three steps to ipsdienol 9 or 10 respectively. The diastereoisomeric 2(10)‐pinen‐4‐ols 6 and 7 (or 5 and 8 ), wich have identical chirality at the carbon atoms bearing OH groups, afford ipsdienol 10 (or 9 respectively) with the same optical purity as the starting material.