Dihydrojasmone AC

Dihydrojasmone is a fragrance that evokes a sense of timeless elegance and natural beauty.
The aroma is a harmonious blend of floral, jasmine-like notes, interwoven with woody and spicy undertones.
It carries a subtle fruity brightness, reminiscent of sunny orchards, and a powdery freshness.

Dihydrojasmone is synthesized through a series of chemical reactions, often starting with levulinic acid.

Here’s a simplified overview of the process:

1. Formation of a Weinreb Amide: Levulinic acid is reacted with 1,1′-carbonyldiimidazole (CDI) to form a Weinreb amide, which is a key intermediate.
2. Conversion to a Ketal: The carbonyl group of the amide is converted into a ketal using p-toluenesulfonic acid, trimethyl orthoformate, and methanol.
3. Grignard Reaction: The ketal is reacted with hexyl magnesium bromide (a Grignard reagent) to produce a diketone.
4. Cyclization: The diketone undergoes an aldol reaction under basic conditions, leading to the formation of dihydrojasmone.

This process results in a light brown liquid with the characteristic floral, woody, and jasmine-like scent.

The synthesis is often refined to achieve high purity and yield, making it suitable for use in the fragrance industry

Synonyms:
– 2-Pentyl-3-methyl-2-cyclopenten-1-one
– 2-Amyl-3-methyl-2-cyclopenten-1-one

Occurs naturally in: Osmanthus absolute