Oxidation, Oxidative Esterification and Ammoxidation of Acrolein over Metal Oxides: Do These Reactions Include Nucleophilic Acyl Substitution?
XII European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources” (EuropaCat-XII)
30 Aug - 4 Sep 2015
||EuropaCat XII. Catalysis: Balancing the use of fossil and renewable resources. XII European Congress on Catalysis. Kazan (Russia). 30th Aug. - 4th Sept., 2015 : Book of Abstracts
Boreskov Institute of Catalysis. Novosibirsk.2015.
2184 c. ISBN 9785906376107.
Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia
Novosibirsk State University, Novosibirsk, Russia
Tomsk State University, Tomsk, Russia
It is known that nucleophilic acyl substitution in the RCOX compounds (X = Hal, OCOR, and other “good leaving” groups) is a fundamental and energetically favorable route to carboxylic acid derivatives. When water, alcohols and ammonia are used as nucleophiles, carboxylic acids, esters and amides (or nitriles) are obtained, respectively. On the other hand, the same products are derived from aldehydes upon their catalytic aerobic oxidation, on condition that water, alcohols and ammonia are present in the feed gas. Therefore, one can surmise that nucleophilic substitution reactions are involved intrinsically in the catalytic oxidation reactions. In agreement with this hypothesis we have shown, as an example, that the selfsame catalyst, MoVTeNb mixed oxides, enables successful oxidation, oxidative esterification and ammoxidation of acrolein. In addition, the concept was considered in the view of established organic and general chemistry principals.