The Knoevenagel reaction is assisted by sodiumnitrate/fluorapatite in heterogeneous media. The reaction is carried out between an activated methylene and an aldehyde at room temperature without a solvent. The yields obtained are very high.
Natural phosphate doped with potassium fluoride and modified with sodium nitrate: efficient catalysts for the Knoevenagel condensation
作者:Saı̈d Sebti、Abdellatif Smahi、Abderrahim Solhy
DOI:10.1016/s0040-4039(02)00092-8
日期:2002.3
A high yield synthesis of activated alkenes is described using the inexpensive natural phosphate alone, doped with potassium fluoride or modified by sodium nitrate. The Knoevenagel condensation was carried out in mild conditions at room temperature in methanol. The catalytic activity of these phosphates are compared.