Mild and efficient prepare disperse yellow 184, disperse yellow 232 and their analogues via LTTM promoted three-component reaction
| Autor: | Ao Liu, Jiali Gao, Yue An, Yudi Xiao, Yizhen Zou, Cheng-Wei Lü |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Ethanol
Process Chemistry and Technology General Chemical Engineering Oxalic acid 02 engineering and technology Raw material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Combinatorial chemistry 0104 chemical sciences Catalysis Solvent chemistry.chemical_compound Disperse yellow chemistry Salicylaldehyde Ethyl cyanoacetate 0210 nano-technology |
| Zdroj: | Dyes and Pigments. 179:108415 |
| ISSN: | 0143-7208 |
| Popis: | A convenient protocol for the synthesis of disperse yellow 184, disperse yellow 232 and their analogues via a three-component one-pot reaction of salicylaldehyde, o-aminophenol and ethyl cyanoacetate has been established. Cheap and eco-friendly ethanol was employed as solvent. One drop of low-transition-temperature mixture (LTTM) which formed from l (−)-Proline and oxalic acid could smoothly promote the reaction of 0.5 mmol raw materials. Compared to the classical methodologies, the present pathway has broad reaction scope and affords all products in good to excellent yields. Furthermore, this process could reduce the reaction temperature from 135 to 85 °C and avoid the problems associated with catalyst cost, handling, safety and pollution. On the basis of comparative experiments and DFT calculation, possible mechanism of this strategy is discussed in detail. |
| Databáze: | OpenAIRE |
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