Table 2.
Methylation of arenes in the (CH3)3O+CF3SO3−/2 CF3SO3H:B(CF3SO3)3
| Arene | T, °C | Time, h | ortho, % | meta, % | para, % | Yield, % |
|---|---|---|---|---|---|---|
| Benzene | 23 | 10 | 20 | |||
| Toluene | 23 | 10 | 64 | 12 | 24 | 21 |
| Chlorobenzene | 45 | 11 | 34 | 2 | 64 | 18 |
| Fluorobenzene | 45 | 11 | 14 | 0 | 86 | 17 |
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