Effect of Reaction Parameters on the Synthesis of 5-Arylidene Barbituric Acid Derivatives in Ball Mills
| Autor: | Arno Kwade, Matej Baláž, Christine Friederike Burmeister, Achim Stolle, Robert Schmidt |
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| Rok vydání: | 2015 |
| Předmět: |
Barbituric acid
Chemistry High Energy Physics::Lattice Organic Chemistry Metallurgy General Relativity and Quantum Cosmology High Energy Physics::Theory chemistry.chemical_compound Low energy Chemical engineering Ball diameter Ball (bearing) Mill Knoevenagel condensation Physical and Theoretical Chemistry Mortar Ball mill |
| Zdroj: | Organic Process Research & Development. 19:427-436 |
| ISSN: | 1520-586X 1083-6160 |
| Popis: | The influence of crucial reaction parameters on Knoevenagel condensation in planetary ball mills was investigated. Rotation frequency (νrot), milling ball diameter (dMB), milling ball filling degree (ΦMB), and beaker size had obvious influences on yield. It was found that higher νrot, lower dMB, milling beakers with larger diameter, and a ΦMB of ∼0.3 are advantageous for the reaction. Furthermore, the influence of the type of mill was investigated, including reactions performed in different planetary and mixer ball mills, in a stirred media mill, and with a mortar mill. Comparisons with the other solvent-free synthetic routes showed that ball milling is an effective way of performing the reaction with low energy intensity. |
| Databáze: | OpenAIRE |
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