Alpha-methyl-beta-ethyl acrolein (2-methyl-2-pentenal) has a powerful, pungent green-aldehydic odor with a sharp, penetrating character. It carries fatty, cocoa-like and slightly fruity nuances on dry-down, reminiscent of unripe fruit skins and roasted cereals. Very aggressive neat and requires heavy dilution.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 862.
Colorless mobile liquid.
Insoluble in water, soluble in alcohol and oils.
Powerful and diffusive, gassy-green and slightly fruity odor of poor tenacity.
This aldehyde has been suggested for use in perfume compositions as part of novel green topnote complexes. It has also been used to a minor extent in the reconstruction of certain essential oils.
The aldehyde has found some use in the reconstruction of Onion volatile oil, in which it has been identified as a natural component. It has also been identified as a natural component of Coffee bean (before roasting), and furthermore in the volatile components of roasted Coffee bean.
Produced from Propionaldehyde by self-condensation (Aldol-condensation).