Compound | R | Temperature, ˚C | Time (h) | Flash mixture, petroleum ether-ethylacetate | Yield (%) |
1 | 3,4-(MeO)2C6H3 | 50 | 3 | 5:1 | 76 |
2 | 3,4,5-(MeO)3C6H2 | 70 | 6 | 10:1 | 16 |
3 | 4-(CF3)C6H4 | 70 | 3 | 20:1 | 35 |
4 | 1-naphtyl | 50 | 6 | 10:1 | 76 |
5 | CH=CHPh | 50 | 3 | 10:1 | 36 |
6 | 2-furyl | 50 | 3 | 10:1 | 34 |
7 | 2-thienyl | 50 | 3 | 10:1 | 35 |
8 | 2-pyridyl | 50 | 6 | 5:1 | 17 |
9 | 3-pyridyl | 50 | 6 | 3:1 | 33 |
10 | 4-pyridyl | 50 | 6 | 3:1 | 17 |
11 | ferrocenyl | 70 | 6 | 10:1 | 6 |
11a | ferrocenyl | 70 | 6 | 10:1 | 28 |