Hydrothermal reactions of lactic acid catalysed by group: VIII Metal complexes |
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| Authors: | Barbara Odell George Earlam David J. Cole-Hamilton |
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| Affiliation: | Shell Research Limited, Sittingbourne Research Centre, Sittingbourne, Kent ME9 8AG Great Britain;School of Chemistry, University of Liverpool, P.O. Box 147, Liverpool, L69 3BX Great Britain |
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| Abstract: | At 220–250°C, in the presence of [PtH(PEt3)3]+ in aqueous solution, α-hydroxypropanoic acid (lactic acid) is converted into propanoic, propenoic, β-hydroxypropanoic, pyruvic and acetic acids. The reactions catalysed by [PtH(PEt3)3]+ appear to be double bond hydration and hydrogenation, alcohol dehydration, transfer hydrogenation, decarbonylation and the water-gas shift reaction. Propenoic acid under similar conditions gives similar products. Attempts to catalyse the dehydrocarboxylation of lactic acid using PdCl2, [PtCl2(PPh3)2], [IrH(CO)(PPh3)3] and [Ni(CO)2(PPh3)2] were partially successful, although competing disproportionation gave a wide range of products. |
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| Keywords: | To whom correspondence should be addressed. |
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