Table 1 Bismuth nitrate-induced nitration of eugenol under different conditions
From: Bismuth nitrate pentahydrate-induced novel nitration of eugenol
Entry | Solid surface | Method/Solvent | Yield (%) |
|---|---|---|---|
1 | Florisil | Dean-Stark/Benzene | 75 |
2 | Silica gel | Dean-Stark/Benzene | 100 |
3 | Molecular sieves | Dean-Stark/Benzene | 80 |
4 | KSF clay | Dean-Stark/Benzene | 95 |
5 | Neutral alumina | Dean-Stark/Benzene | 90 |
6 | Florisil | Reflux/DCM | 80 |
7 | Silica gel | Reflux/DCM | 90 |
8 | Molecular sieves | Reflux/DCM | 80 |
9 | KSF clay | Reflux/DCM | 92 |
10 | Neutral alumina | Reflux/DCM | 84 |
11 | Florisil | Dry | NR |
12 | Silica gel | Dry | NR* |
13 | Molecular sieves | Dry | NR |
14 | KSF clay | Dry | NR |
15 | Neutral alumina | Dry | NR |
16 | Florisil | Microwave/Solvent Free | 90 |
17 | Silica gel | Microwave/Solvent Free | 100 |
18 | Molecular sieves | Microwave/Solvent Free | 95 |
19 | KSF clay | Microwave/Solvent Free | 100 |
20 | Neutral alumina | Microwave/Solvent Free | 92 |
21 | Florisil | Reflux/Benzene | 83 |
22 | Silica gel | Reflux/Benzene | 100 |
23 | Molecular sieves | Reflux/Benzene | 85 |
24 | KSF clay | Reflux/Benzene | 95 |
25 | Neutral alumina | Reflux/Benzene | 92 |