Table 2. Assay Results for Nitroalkylpyrimidines as Inhibitors of PTR1 and Anti-trypanosomal Activity Against T. b. brucei in Culture and Human HEK Cells.

| cpd. no. | R | X | TbPTR1 (Kiapp μM) | T. b. brucei (IC50 μM) | HEK (IC50 μM) |
|---|---|---|---|---|---|
| 26a | OH | 4-Me–C6H4 | >100 | 2.038 | 73.36 |
| 26b | OH | 4-F–C6H4 | >100 | 1.857 | 149.5 |
| 26c | OH | H | >100 | 1.016 | 134.2 |
| 26d | OH | Ph(CH2)2 | >100 | N/A | NT |
| 28a | NH2 | 4-Me–C6H4 | Insol | 0.47 | 32.45 |
| 28b | NH2 | 4-F–C6H4 | ∼50 | 0.16 | 39.11 |
| 28c | NH2 | H | Insol | 0.13 | 34.98 |
| 28d | NH2 | Ph(CH2)2 | >100 | 8.82 | NT |
| 30a | Me2CHCH2O– | 4-F–C6H4– | >100 | 13.9 (HMI-9), 10.6 (CMM) | NT |
| 30b | N-cyclohexyl amino | 4-F–C6H4– | >100 | 0.54 (HMI-9), 0.80 (CMM) | 32.62 |
| 30c | i-PrO | 4-F–C6H4– | Insol | 15.9 (HMI-9), 8.48 (CMM) | NT |