Table 1. DNA binding properties of 1 and 2 and impact on cell proliferation.
| IC50 (μM) | |||||
|---|---|---|---|---|---|
| Compound | Log P | DNA Kb (M−1) | HeLa | MCF7 | HFF |
| 1 | 0.403 | 2.5 × 106 | 38 | 28 | >100 |
| 2 | 0.076 | 6.7 × 107 | 14 | 12 | >100 |
| Cisplatin | −2.3 | N/A | 9 | 11 | >100 |
| MX | 0.36 | 5 × 106 | 3.0 | 3.6 | 4.2 |
Log P = octanol/water partition coefficient. Kb (M−1) determined from hypochromic shifts on addition of DNA. IC50 values were derived from 24 h proliferation assays.