Issue 48, 2019, Issue in Progress

Selective Wacker type oxidation of a macrocyclic diene to the corresponding monounsaturated ketone used as fragrance

Abstract

A selective reaction method for the efficient conversion of an isomeric mixture of 1,9-cyclohexadecadiene (1,9-CHDD) to the corresponding monounsaturated cyclohexadec-8-en-1-one (8-CHD) is described. 8-CHD was synthesized via Wacker type oxidation at room temperature using a highly electrophilic in situ formed dicationic palladium species. Isomerisation of the diene and over-oxidation of the substrate could be nearly suppressed by suitable reaction control, which has a positive effect on selectivity. The utilization of molecular oxygen as a green oxidant and environmentally benign iron(III) salts as co-catalysts was successfully applied. This reaction strategy is promising to overcome the low overall reactivity of internal olefins in Wacker type oxidations. In addition, larger scale experiments showed further potential for industrial application.

Graphical abstract: Selective Wacker type oxidation of a macrocyclic diene to the corresponding monounsaturated ketone used as fragrance

Supplementary files

Article information

Article type
Paper
Submitted
01 Jul 2019
Accepted
24 Aug 2019
First published
04 Sep 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 27865-27873

Selective Wacker type oxidation of a macrocyclic diene to the corresponding monounsaturated ketone used as fragrance

T. Brunzel, J. Heppekausen, J. Panten and A. Köckritz, RSC Adv., 2019, 9, 27865 DOI: 10.1039/C9RA04971A

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