TABLE 7.
The previously reported conditions and methods in the synthesis of pyrano[2,3-c]pyrazole compared to the method presented in this study.
| Reported year | Product | Condition (catalyst) | Reaction temperature (°C) | Time | Yield (%) | Reference |
|---|---|---|---|---|---|---|
| 2018 | 6a | Bael fruit ash | 20 | 15 min | 92 | Shinde et al. (2018) |
| 2018 | 6a | Sodium L-ascorbate | Reflux of water | 10 min | 88 | Kiyani and Bamdad (2018) |
| This work | 6a | Choline Chloride: Urea | 70 | 17 min | 95 | - |
| 2023 | 6b | Copper(II) oxide incorporated onto montmorilonite-K10 functionalized with tetraethyl orthosilicate, epichlorohydrine, melamine, and 5-sulphosalisilic acid | 20 | Not reported | 90 | Karrabi et al. (2023) |
| 2023 | 6b | Potassium dihydrogenphosphate | 100 | 2 h | 95 | Mathavan and Yamajala (2023) |
| 2022 | 6b | Phenylazophenylenediamine-based lanthanum complex supported on silica-coated magnetic nano-Fe3O4 core-shell nanocatalyst | 110 | 12 | 90 | Ghorbani et al. (2022) |
| 2021 | 6b | Sugarcane bagasse ash-based silica-supported boric acid | 80 | 35 min | 86 | Pandey et al. (2021) |
| 2022 | 6b | Tungstic acid immobilized on zirconium-L-aspartate amino acid metal-organic framework-grafted L-(+)-tartaric acid stabilized magnetic Fe3O4 nanoparticles | 60 | 45 min | 92 | Khademi et al. (2021) |
| This work | 6b | Choline chloride:urea | 70 | 15 min | 95 | - |