Table 5 Comparison of FNAOSiPPEA/Cu(II) with other catalysts for the synthesis of PBT
Entry | Amount of Catalyst (g) | Solvent | Temp. (℃) | Time (h) | Yield (%) | Refs, |
|---|---|---|---|---|---|---|
1 | Trypsin (0.03 g) | Ethylene glycol | 60 | 48 | 94 | [34] |
2 | Chitosan/HOAc (0.08 g) | H2O | 60 | 1.40 | 72 | [35] |
3 | SMI-SO3H (0.08 g) | Solvent-free | 100 | 3 | 80 | [36] |
4 | Nano-cellulose/BF3/Fe3O4 (0.06 g) | Solvent-free | 100 | 1 | 80 | [9] |
5 | Tetrabutylammonium hydrogen sulfate (10 mol %) | Ethylene glycol | 120 | 2 | 83 | [37] |
6 | FNAOSiPPEA/Cu(II) (0.04 g) | Solvent-free | 100 | 1 | 97 | This work |