New spirocyclic compounds

摘要

The new spirocyclic compounds of the general formula (I): <CHEM> are powerful odorants. In the formula the -C(O)X-substituted ring is saturated or unsaturated in the alpha or beta position, and X represents a methylene group or an oxygen atom, R<1>, R<2>, R<3>, R<4> are independently a hydrogen atom or a methyl radical, n or n' are independently 1 or 2 and R<4> can be at any position on the ring not being the -C(O)X substituted ring.