Optimization of the PEGylation of 5,10,15,20-tetrakis(pentafluorophenyl)porphyrin with 2-(2-aminoethoxy)ethanol carried out in NMP.
Entry | Equiv. amine-PEG | Reaction conditions | Yield (%) |
---|---|---|---|
1 | 10 | MW, 200 °C, 2 min | 9 |
2 | 10 | MW, 200 °C, 5 min | 42 |
3 | 20 | MW, 200 °C, 5 min | 45 |
4 | 10 | MW, 70 °C, 18 min | 48 |
5 | 10 | MW, 200 °C, 10 min | 77 |
6 | 10 | 200 °C, 3 h | 68 |