Epoxidation of Neral/Geranial Using a Jacobsen-Katsuki Mn catalyst by Chemical and Electrochemical Methods

Abstract

In this study, trans-(±)-N,N′-bis(salicylidene)-1,2-cyclo-hexanediaminemanganese(III) chloride ([Mn(t-salcn)]Cl) was synthe-sized and used as a catalyst for the epoxidation of citral. The percentage of converted citral in two methods, chemical and electro-chemical, was determined and compared; in the former method, the oxidizing agent NaClO was directly and completely added at the start of the reaction, while in the latter, ClO− was progressively generated in situ. The reaction was monitored by the quantification of citral using gas chromatography coupled to mass spectrometry. The results showed that in both cases, the major products correspond to epoxides from ci-tral isomers, although differences were observed in the value of per-centage of epoxides obtained, besides the generation of side reactions affecting the yield of the product of interest.

Electrochemical Synthesis and Reactivity of Three‐Membered Strained Carbo‐ and Heterocycles

“…In 2016, Ochoa and co-workers disclosed epoxidation of neral/geranial using a Jacobsen-Katsuki Mn catalyst by chemical and electrochemical methods. [51] The process was carried out in an undivided cell equipped with two platinum electrodes with the application of a current density of 20.0 mA. The mechanism initiates with the generation of ClO À in the aqueous phase from the oxidation of Cl À at the surface of the platinum electrode.…”

“…In 2016, Ochoa and co‐workers disclosed epoxidation of neral/geranial using a Jacobsen–Katsuki Mn catalyst by chemical and electrochemical methods [51] . The process was carried out in an undivided cell equipped with two platinum electrodes with the application of a current density of 20.0 mA.…”