ChemInform Abstract: BY‐PRODUCTS FROM HYDROFORMYLATION OF ACRYLONITRILE

Abstract

Bei der Hydroformylierung von Acrylnitril (I) mit Synthesegas in Methanol unter Druck mit Kobaltcarbonylverbindungen als Katalysatoren entstehen als Hauptprodukte β‐Cyanpropionaldehyd (II) und sein Dimethylacetal (III).

Chlorination of .omega.-cyanoalkanoic acids in aqueous medium

“…The structural assignment of CPA and CBA produced on chlorination of terrestrial HA was based on the electron impact (El) and chemical ionization GC/MS spectra of their methyl esters. In the case of CPA, an El spectrum was available in the literature (14), which was in close agreement with the experimental spectrum.…”

Identification of intermediates leading to chloroform and C-4 diacids in the chlorination of humic acid

“…Two cyano-substituted carboxylic acids were detected for the first time and «identified as 3-cyanopropanoic acid (level 2) and 4-cyanobutanoic acid (level 1). The El and Cl spectra for the methyl esters of both compounds are given in Figures 4 and 5 The spectrum assigned to methyl 3-cyanopropanoate showed a good match with a reference spectrum (39), while the possibility of methyl 2-cyanopropanoate could be ruled out as this compound shows fragments at m/z 59 and 68 as the dominant peaks. The spectrum of the cyanobutanoic acid is assigned to methyl 4-cyanobutanoate on the basis of the formation of the m/z 74 ion, which is the normal McLafferty rearrangement product for unbranched methyl alkanoates with atoms, and the m/z 87 ion, which indicates the 4position of the cyano group (eq 1).…”

“…In a similar way, the 3,3,5,5,5-pentachloro-4-hydroxypentanoic acid (68) may be converted into chloroform and the most abundant C-4 diacid, 2,2-dichlorobutanedioic acid (39).…”