Heterogeneous Permanganate Oxidation of Styrene and Cinnamic Acid Derivatives: A Simple and Effective Method for the Preparation of Benzaldehydes

Abstract

Styrene and cinnamic acid derivatives yield correspondingly substituted benzaldehydes when oxidized by permanganate under heterogeneous conditions. Reaction of terminal aliphatic alkenes under similar conditions gives discouragingly low yields; however, ketones and ketols are obtained in very good yields from the oxidation of 2,2-disubstituted and trisubstituted alkenes, respectively. Alumina and Amberlite IR-120 can be used as solid supports in these reactions with equally good results.

Key words

oxidation - styrene - cinnamic acid - benzaldehyde - permanganate - heterogeneous - solid support

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