| abstract |
The cyclic isolongifolanone ketals of the general formula A , in which the serpentine lines α and β configuration and R, R 'each represent hydrogen, methyl or ethyl radicals, are new and can advantageously be used as fragrances or as constituents of perfume compositions . They are preferably prepared by oxidizing isolongifolene obtained from longifols to isolongifolan-3-one in a manner known per se and reacting this with aliphatic 1,2-diols with water separation in apolar solvents. R = R '= H R = H, R '= Me / R = Me, R' = H R = H, R '= Et / R = Et, R' = H R = R '= Me (α, β) |