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Short Reports • J. Braz. Chem. Soc. 15 (5) • Oct 2004 • https://doi.org/10.1590/S0103-50532004000500026   copy

Silica sulfuric acid as an efficient and reusable reagent for crossed-aldol condensation of ketones with aromatic aldehydes under solvent-free conditions

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Aromatic aldehydes undergo crossed-aldol condensation with ketones in the presence of silica sulfuric acid under solvent-free conditions to afford the corresponding <FONT FACE=Symbol>a, b</FONT>-unsaturated aldol products in excellent yields. The reagent is reusable for several times without any decrease in the yield of the reactions.

crossed-aldol condensation; silica sulfuric acid; solid phase; <FONT FACE=Symbol>a, b</FONT>-unsaturated carbonyls

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