| abstract |
The present invention relates to a method for synthetizing a compound of the following formula (I): n n n n n n n n n n wherein R is a methyl or ethyl group, n is 1 or 2, and X is a CH 2 or CD 2 group, from a compound of the following formula (II): n n n n n n n n n n wherein R and n are as defined above,n nand also relates to a method for assaying the compounds of the formula (I) using a corresponding deuterated derivative as an internal reference, as well as to the use of ketal derivatives of compounds of the formula (I) as a stable precursor, in particular in a flavoring composition. |