Table 1.
| |||
---|---|---|---|
Comp. | R | Time | % Yield |
18a | 6-ethyl | 30 min | 46 |
18b | 4-methyl | 30 min | 47 |
18c | 3-methyl | 9 h | 8 |
18d | 5-chloro | 30 min | 59 |
18e | 5-bromo | 10 min | 64 |
18f | 5-iodo | 1 h | 68 |
18g | 3,5-dichloro | 1 h | 67 |
18h | 5-bromo-6-methyl | 30 min | 62 |
18i | 3-chloro-5-CF3 | 45 min | 75 |