zeotype; conditions were 25 °C to 170 °C in organic media. Benzaldehyde and 2-butanone yielded branched (reaction at -CH2- of butanone) and linear (reaction at -CH3) addition and condensation
products; and fission of the branched aldol led to β-methyl styrene and acetic acid. Strong acids promoted the dehydration step, and regioselectivity originated from preferred formation of the branched aldol. Both, resins and functionalized SBA-15 materials yielded predominantly the branched condensation product, unless particle morphology or temperature moved the reaction into the diffusion-limited regime, in which case more fission products were formed, corresponding to Wheeler Type II selectivity. For Hform zeolites, fission of the branched aldol competed with dehydration of the linear aldol, possibly because weaker acidity or steric restrictions prevented dehydration of the branched aldol.
Bibliographical noteCopyright © 2018 by John Wiley & Sons. This is the peer reviewed version of the following article: Intraparticle Diffusional Effects vs. Site Effects on Reaction Pathways in Liquid-Phase Cross Aldol Reactions
Ponnuru, K., Manayil, J. C., Cho, H. J., Fan, W., Wilson, K. & Jentoft, F. 7 Jan 2018 In : ChemPhysChem., which has been published in final form at http://doi.org/10.1002/cphc.201701219. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Funding: NSF award 1560519. EPSRC (EP/K000616/2)
- acid-base catalysis
- C-C bond cleavage
- C-C coupling
- Biomass Conversion
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Intraparticle Diffusional Effects vs. Site Effects on Reaction Pathways in Liquid-Phase Cross Aldol Reactions
Ponnuru, K. (Creator), C. Manayil, J. (Creator), Cho, H. J. (Creator), Fan, W. (Creator), Wilson, K. (Creator) & Jentoft, F. (Creator), Aston Data Explorer, 15 Jan 2018