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- W2079372476 abstract "Abstract The solid base catalysed aldol condensation of acetone was performed over a CsOH/SiO2 catalyst using a H2 carrier gas. The products observed were diacetone alcohol, mesityl oxide, phorone, iso-phorone and the hydrogenated product of mesityl oxide, methyl isobutyl ketone. Deuterium tracer experiments were performed to gain an insight into the reaction mechanism. Over 10% CsOH/SiO2 deuterium exchange of acetone was very facile with conversion up to 92%. Isotope studies have revealed that the hydrogenation step from mesityl oxide to MIBK occurs though the addition of protium and not via deuterium. This is a result of the dilution of the deuterium pool on the catalyst surface due to facile H/D exchange of acetone. The formation of isophorone is proposed to occur via an aldol condensation of 4,4′-dimethyl hepta-2,6-dione and not through the internal 1,6-Michael addition of phorone. A mechanism is proposed." @default.
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- W2079372476 date "2005-08-01" @default.
- W2079372476 modified "2023-09-27" @default.
- W2079372476 title "Aldol condensation of acetone over CsOH/SiO2: A mechanistic insight using isotopic labelling" @default.
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- W2079372476 doi "https://doi.org/10.1016/j.apcata.2005.04.019" @default.
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