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| solvent, time, temperature | cis/trans ratio |
|---|---|
| EtOH, 4 h, reflux | 6 |
| EtOH, 7 h, reflux | 8 |
| acetone, 2.5 h, reflux | 18 |
| DMF, 4 h, 110°C | 9 |
| DMF, overnight, 110°C | 17 |
