MONOTERPENOIDS-VI. ON THE OPTICAL PURITY OF (+)-CAR-3-ENE FROM PINUS ROXBURGHII, AND THE SOURCE OF RACEMIZATION OF (-)-MENTHOL DERIVED THEREFROM

Article abstract of DOI:10.1016/S0040-4020(01)86224-4

It is shown that (+)-car-3-ene occurring in the oleoresin from Pinus roxburghii is optically pure.It is also demonstrated that in the production of (-)-menthol from (+)-car-3-ene by the MRC process, partial racemization of (-)-menthol has its origin at the stage of (+)-isoterpinolene.