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Synteza substancji zapachowych - pochodnych aldehydów

Mitka K., Staryńska J.

Czasopismo Techniczne. Chemia

2012

R. 109, z. 2-Ch

135--148

W artykule przedstawiono krótką historię substancji zapachowych oraz scharakteryzowano aldehydy najczęściej stosowane w kompozycjach zapachowych. Opisano także syntezy odpowiednich aldehydów aromatycznych z chlorowodorkiem hydroksyloaminy, w wyniku których otrzymano nitryle.

In this paper a short history of fragrances is described and the aldehydes most often used in perfumes are presented. The reactions of various aromatic aldehydes with hydroxylamine hydrochloride are also discussed.

Tartaronitriles – the Derivatives of Tartaric Acid with a Bent Conformation

Gawroński J., Gawrońska K., Waścinska N., Plutecka A., Rychlewska U.

Polish Journal of Chemistry

2007

Vol. 81, nr 11

1917-1925

Conformational preferences of dinitrile derivatives of (R,R)-tartaric acid were studied by means of NMR, CD and X-ray diffraction techniques. Where as other derivatives of (R,R)-tartaric acid exist predom i nantly in an extended (T) or bent (G–) conformation, (R,R)-tartarodinitriles show pronounced tendency to ward bent G+ conformation. This is rationalized by the presence of the “gauche effect” in volving maximum number of stabilizing in teractions between the polar groups within the tartarodinitrile molecule.

Hydrogen Peroxide Oxidation of N,N-Dimethylhydrazones Promoted by Selenium compounds, Titanosilicalites or Acetonitrile

Giurg M., Młochowski J., Ambrożak A.

Polish Journal of Chemistry

2002

Vol. 76 / nr 12

1713-1720

Hydrogen peroxide oxidation of N,N-dimethylhydrazones 1 promoted by title reagents has been investigated. Depending on the substrate nitrile 2 and/or amide 3 accompanied with carboxylic acid 4 and parent carbonyl compounds 5 were obtained. Formation of nitriles 2 with H2O2-acetonitrile system is limited for a few more active substrates. The mechanism of the reaction, based on generated in situ peroxyiminoacetic acid, is presented. A broad spectrum of aliphatic, unsaturated and aromatic nitriles 2 was obtained by oxidation of corresponding N,N-dimethylhydrazones 1 with hydrogen peroxide in the presence of poly(bis-9,10-anthracenyl) diselenide (PADS) (7) as catalyst.