8448. Senecialdehyde

Nomenclature

CAS number: 107-86-8
3-Methyl-2-butenal; 3,3-dimethylacrolein; 3-methylcrotonaldehyde; senecioaldehyde; β,β-dimethylacrolein.
C5H8O; mol wt 84.12.
C 71.39%, H 9.59%, O 19.02%.

Description and references

Prepn from isoamyl alcohol: Fischer et al., Ber. 64, 30 (1931); Fischer, L"owenberg, Ann. 494, 272 (1932); cf. Burkhardt et al., GB 512465 (1939); Montavon, Saucy, US 2902515 (1959 to Hoffmann-La Roche). Absorption spectrum: Forbes, Skilton, J. Org. Chem. 24, 436 (1959).

Chemical structure

Properties

Liquid. Odor more pungent than that of isovaleraldehyde. Autooxidizes easily, but the pure substance can be stored under vacuum. d420 0.8722; bp730 133°; nD20 1.4526.

Caution

Irritant to mucous membranes. Narcotic in high concentrations.