Table 5. Recycling of the CTAB Solution to Synthesize Compound 3ha.
| Yield
(%) |
||
|---|---|---|
| Trial | CTAB | Tween 80 |
| 25 °C | 45 °C | |
| 1 | 81 | 89 |
| 2 | 81 | 88 |
| 3 | 80 | 90 |
| E-factor | 4.2 | 3.7 |
| PMI | 5.2 | 4.7 |
Reaction conditions: 4-bromobenzaldehyde (5 mmol), acetophenone (5 mmol), NaOH (5 mmol), surfactant solution 2% (5 mL), 24 h.