Table 10.
Colours, yields, and meting points of the target compounds
| Compounds | Color | Meting points (°C) |
|---|---|---|
| 12a | White crystals | 230–232 |
| 12b | White crystals | 240–242 |
| 12c | White crystals | 235–237 |
| 12d | White crystals | 211–215 |
| 12e | White crystals | 233–235 |
| 12f | White crystals | 222–224 |
| 12g | White crystals | 252–254 |
| 12h | White crystals | 244–246 |
| 12i | White crystals | 255–257 |
| 12j | White crystals | 240–242 |
| 12k | White crystals | 220–222 |
| 12l | White crystals | 266–268 |
| 13a | White crystals | 223–225 |
| 13b | White crystals | 211–213 |
| 13c | White crystals | 235–237 |