A synthetic route of the title compound, a new dihydrogenated derivative of lavendulol, starting with readily available isoanyl from the distillation residue in the ethanol production process with sugarhouse molasses in South China is described. Phase-tramsfer catalytic condensation of isoamyl chloride with acetone gave 6-methyl-2-heptanone in a yield of 43% , which upon methylation and dehydrochlorination led to 2,6-dimethyl-2-heptene. Prins reaction of the alkene with paraformaldehyde in stannic chloride-dichloromethane afforded the final product in a yield of 41.2% . Dihydro (4,5) lavandulol seems to be a mimic with nice but a little milder lavender scent.

Key words: ISOAMYL ALCOHOL, LAVANDULOL, ENVIRONMENTAL PROTECTION