Campherenanes and Santalanes

Bonds from C-1 to C-6 and C-3 to C-7 of famesane formally build up the bi-cyclo[2.2.1]heptane core stracture of campherenane. (-)-Campherenol and (-)- 

An additional bond from C-2 to C-4 of campherenane formally leads to tricyclic a-santalane, the basic skeleton of some constituents found in sandalwood oil (oil of santal) with a woody, sweet, balsamic odor, used in perfumery and as a urinary antiinfective obtained from dried heartwood of the tree Santalum album (San-talaceae) grown in east India. Examples include (+)-( -a-santalol with a slight woody odor similar to cedar wood oil and (+)-(Ej-a-santalal, with a strong woody odor. 

Cleavage of the C-3-C-4 bond of farnesane and connection of new bonds from C-2 to C-4, C-3 to C-7 and C-1 to C-4 lead to bicyclic p-santalane, which is another basic skeleton of substances found in sandalwood. Examples are (-)-p-santalene and (-)-( -p-santalol with a pleasant woody, slightly urinary odor used in perfumes and detergents 

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