Combining bio- and chemo-catalysis for the conversion of bio-renewable alcohols: homogeneous iridium catalysed hydrogen transfer initiated dehydration of 1, 3-propanediol to aldehydes. Issue 6 (19th November 2015)

• Record Type: Journal Article
• Authors: Wang, Yue-Ming; Lorenzini, Fabio; Rebros, Martin; Saunders, Graham C.; Marr, Andrew C.
• Is Part Of: Green chemistry. Volume 18:Issue 6(2016)
• Page Start: 1751
• Page End: 1761
• Publication Date: 2015-11-19
• Subjects: Environmental chemistry -- Industrial applications -- Periodicals; Environmental management -- Periodicals; 660
• DOI: 10.1039/c5gc02157j
• Languages: English
• ISSNs: 1463-9262

Abstract

Abstract : The hydrogen transfer initiated dehydration of 1, 3-propanadiol to propionaldehyde, catalysed by a highly recyclable, air and water stable, soluble Ir(iii ) complex, in an ionic liquid, was demonstrated. Abstract : Combining whole cell biocatalysis and chemocatalysis in a single reaction sequence avoids unnecessary separations, and the associated waste and energy consumption. Bacterial fermentation has been employed to convert waste glycerol from biodiesel production into 1, 3-propanediol. This 1, 3-propanediol can be extracted selectively from the aqueous fermentation broth using ionic liquids. 1, 3-Propanediol in ionic liquid solution was converted to propionaldehyde by hydrogen transfer initiated dehydration (HTID) catalysed by a Cp*IrCl2 (NHC) (Cp* = pentamethylcyclopentadienyl; NHC = carbene ligand) complex. The use of an ionic liquid solvent enabled the reaction to be performed under reduced pressure, facilitating the isolation of the product, and improving the reaction selectivity. The Ir(iii ) catalyst in ionic liquid was found to be highly recyclable.