BET surface area, acid amounts, acid density, conversion of 2 and yield of 3 from the monoallylation of 2 using WO3/SiO2, WO3/Al2O3, WO3/TiO2 and WO3/ZrO2.
| Catalystsa | BET (m2 g−1) | Acid amount (mmol g−1) | Acid densityb (mmol m−2) | Yield of 3c,d (%) |
|---|---|---|---|---|
| WO3/SiO2 | 99 | 0.195 | 1.97 × 10−3 | 4 |
| WO3/Al2O3 | 178 | 0.364 | 2.04 × 10−3 | 2 |
| WO3/TiO2 | 55 | 0.221 | 4.02 × 10−3 | 6 |
| WO3/ZrO2 | 105 | 0.301 | 2.87 × 10−3 | 31 |
a
10 wt% WOx was supported.
b
Acid density = (acid amount)/BET.
c
Reaction conditions: 1 (2.0 mmol), 2 (1.0 mmol), catalyst (100 mg), 140 °C, 500 rpm, 4.0 h.
d
Yields were on the basis of 2, determined by GC analysis using biphenyl as an internal standard.