The present invention relates to the field of perfumery and provides certain bi-cyclo derivatives of formula (I) ##STR00001##
wherein R.sup.1 represents a hydrogen atom or a C.sub.1-2 alkyl group; R.sup.2 represents a hydrogen atom or a methyl group; and A represents a group of formula C.sub.3-5 alkanediyl group; at least one of said R.sup.1 or R.sup.2 represents a group containing at least one carbon atom. The compounds are in the form of a E or Z isomer or of a mixture thereof. These compounds are valuable perfuming ingredients capable of imparting lily of the valley and citrus notes to consumer products.

Described are methods for preparing a deuterated aldehyde using N-heterocyclic carbene catalysts in a solvent comprising D.sub.2O. The methods may be used to convert a wide variety of aldehydes (e.g., aryl, alkyl, or alkenyl aldehydes) to C-1 deuterated aldehydes under mild reaction conditions without functionality manipulation.

Described are methods for preparing a deuterated aldehyde using N-heterocyclic carbene catalysts in a solvent comprising D.sub.2O. The methods may be used to convert a wide variety of aldehydes (e.g., aryl, alkyl, or alkenyl aldehydes) to C-1 deuterated aldehydes under mild reaction conditions without functionality manipulation.

The present invention relates to the field of perfumery. More particularly, it concerns valuable new chemical intermediates for producing perfuming ingredients. Moreover, the present invention also comprises a process for producing compound of formula (I). ##STR00001##

The present invention relates to the field of perfumery. More particularly, it concerns valuable new chemical intermediates for producing perfuming ingredients. Moreover, the present invention also comprises a process for producing compound of formula (I). ##STR00001##