Entry | R1 | R2 | Product | Yieldb/% |
1 | Ph | Ph | 3a | 86 |
2 | p-Cl-C6H4 | Ph | 3b | 94 |
3 | p-Br-C6H4 | Ph | 3c | 90 |
4 | p-CH3-C6H4 | Ph | 3d | 94 |
5 | p-CH3O-C6H4 | Ph | 3e | 86 |
6 | 2-furyl | Ph | 3f | 73 |
7 | Ph | p-F-C6H4 | 3g | 98 |
8 | Ph | p-Cl-C6H4 | 3h | 92 |
9 | Ph | p-Br-C6H4 | 3i | 89 |
10 | Ph | p-CH3O-C6H4 | 3j | 85 |
11 | Ph | 2-naphthyl | 3k | 87 |
12 | p-CH3O-C6H4 | p-Cl-C6H4 | 3l | 79 |
13 | p-Cl-C6H4 | p-CH3O-C6H4 | 3m | 82 |
14c | Ph | Ph | 3a | 85 |