Optimization of Cu/NaY catalyst in xanthene synthesisa.
| Reaction number | Amount of catalyst (mg) | Time (minutes) | Yield (percentage) |
|---|---|---|---|
| 1 | 0 | 45 | 25 |
| 2 | 1 | 10 | 72 |
| 3 | 2 | 3 | 98 |
| 4 | 3 | 3 | 98 |
a
Reaction conditions: 2 mmol of dimedone, 1 mmol of benzaldehyde, 110 °C.
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