| abstract |
Tricyclo [2,2,1,0 2,6 ]heptane derivatives of the general formulan where X represents -CH 2 CH 2 -n , and R' and R 2 independently represent hydrogen or methyl, are disclosed, together with perfume compositions in which the derivatives are principal ingredients. A process of making the derivatives involves reacting a tricyclo[2,2,1,0 2,6 ]heptane aldehyde with a dialkyl ketone in the presence of an aldol condensation catalyst to form an α,β-unsaturatad ketone, followed by reducing this ketone in manner which reduces the carbonyl group but not the C=C bond. |