Isomerization of styrene oxide to phenylacetaldehyde over supported phosphotungstic heteropoly acid.
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2010
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Silica-supported H3PW12O40 (PW), the strongest heteropoly acid in the Keggin series, is an efficient, environmentally friendly heterogeneous catalyst for the liquid-phase isomerization of styrene oxide into phenylacetaldehyde, an industrially important intermediate for fine chemical synthesis. The reaction occurs in cyclohexane as a solvent under mild conditions at 25–70 ◦C with low catalyst loadings and without PW leaching in solution. At 60 ◦C, the yield of phenylacetaldehyde reaches 92% at 97% styrene oxide conversion, with a catalyst turnover number of 19 600. The catalyst can be recovered and reused.
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Isomerization, Styrene oxide, Phenylacetaldehyde, Acid catalysis, Heteropoly acid
Citação
COSTA, V. V. et al. Isomerization of styrene oxide to phenylacetaldehyde over supported phosphotungstic heteropoly acid. Applied Catalysis. A, General, v. 383, p. 217-220, 2010. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0926860X10004126>. Acesso em: 02 fev. 2015.