Aldehyde C-9

Other comments :

In comparision to Aldehyde C-8, Aldehyde C-9 has a much more zesty and fresh facet.

Stability :

Aldehydes may form diethylacetals in alcoholic perfumes, with no real impact on their smell

Uses in perfumery :

Aldehyde C-9 is used in citrus fruit reproductions for a power supply, or in rosy notes to give them a characteristic aldehydic facet.

Year of discovery :

Data not available.

Isomerism :

Aldehyde C-9 has no known isomer in perfumery.

Synthesis precursor :

Aldehyde C-9 can be converted to a Schiff base in the presence of Methyl Anthranilate or Indole. It can also be used for condensation with another aldehyde or ketone to form the desired alcene.

Natural availability :

Aldehyde C-9 is present in the essential oil of certain citrus fruits such as Bergamot EO or Sweet Orange EO, but also in trace amounts in Damask Rose EO. It can be extracted from these oils in its natural state.

Synthesis route :

Aldehyde C-9 is an aliphatic aldehyde. Like the other aldehydes, it can be synthesized by reaction of nonyl halides (chloride, for example) and dimethyl sulfoxide (DMSO), followed by an alkaline treatment with sodium bicarbonate. Other synthetic routes exist such as a reduction of Rosenmund from nonylic acid, using an acid chloride.