Abstract 1, 1-Dimethyl-7-isopropyltetralin (II) is formed in up to 40% yield by a ZnCl 2- catalyzed rearrangement-dehydrogenation of longifolene (I), or isolongifolene (III). The structural proof of II is based on spectroscopic and chemical evidence. Acetylation and formylation of II yielded products with a weak musk odour.
