抄録
Acid-catalyzed rearrangement of hinesol α-epoxide (5a) gave 1α-hydroxyeudesmols (9, 10, 11) together with other spirane-type products (6, 8, 14). The same reaction of α-and β-epoxides of hinesol acetate also provided eudesmane derivatives. These results and mechanistic considerations led us to re-examine the formic acid dehydration reaction of hinesol and it was found that the main product does not have the structure 3 or 4 as assumed by Marshall et al., but is identical with (+)-δ-selinene (21).
