Table 1. SAR of Phenyl Derivatives Containing the KU-177 Biaryl Side Chain.

| entry | R1 | R2 | R3 | R4 | R5 | IC50 |
|---|---|---|---|---|---|---|
| 7a | H | H | H | H | H | >10 μM |
| 7b | H | H | OH | H | H | >10 μM |
| 7c | H | H | OMe | H | H | >10 μM |
| 7d | H | H | Cl | H | H | 6.03 ± 1.9 μM |
| 7e | H | H | F | H | H | 6.32 ± 3.1 μM |
| 7f | H | H | COOMe | H | H | >10 μM |
| 7g | H | H | CN | H | H | 8.57 ± 0.3 μM |
| 7h | H | H | CF3 | H | H | 4.83 ± 0.9 μM |
| 7i | H | H | NO2 | H | H | 4.04 ± 0.5 μM |
| 7j | OMe | H | OMe | H | H | 9.53 ± 0.3 μM |
| 7k | Cl | H | Cl | H | H | >10 μM |
| 7l | H | Cl | Cl | H | H | >10 μM |
| 7m | Cl | H | H | H | H | >10 μM |
| 7n | H | OMe | H | OMe | H | >10 μM |
| 7o | H | Cl | H | H | H | >10 μM |
| 7p | H | COOMe | H | H | H | >10 μM |
| 7q | H | NO2 | H | H | H | >10 μM |