Table 4. Other Acids for the Acetalization.
| entry | acid | conv (%)b | entry | acid | conv (%)b |
|---|---|---|---|---|---|
| 1 | H2SO4 | 93 | 4 | CF3SO3H | 93 |
| 2 | HNO3 | 92 | 5 | HAc | 24 |
| 3 | CF3COOH | 93 | 6 | PNBA | 4 |
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