A series of 4-amino-pyrido[2,3-d]pyrimidin-5 8H -ones were designed and synthesized as a novel class of inhibitors of NAD+-dependent DNA ligase that possess potency against Gram-positive bacteria.
The N-methyl analogue 8 is typical for alkyl-substituted R analogues, possessing potency far below that of the HTS hit compounds.
Prior to the creation of the world and hence of matter it possessed real being in potency only by reason of God, its extrinsic cause.
After creation it possessed real being in potency by reason of preexisting matter as well, an intrinsic cause.
Most of synthesized compounds showed moderate enzymatic potency at the same order of magnitude, and compound 12b possessed better potency to the positive control (3.8 μM vs 13.0 μM).
Whilst the furan possessed similar potency to the phenyl compound 7 a, the isoxazole showed a drop in potency to 110 μ m.
Compounds such as 11k (Ki = 6.5 nM) possessed high potency.
In addition, we designed a symmetric indolicidin analogue that possessed antimicrobial potency and selectivity.
Compound 5m containing 6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline possessed good potency against P-gp (EC50 = 0.89 ± 0.11 μM).
From this series, compounds, b9, b10, b11 and b12 possessed better potency against NCI-H226 and NPC-TW01 cancer cells (Table 19, Fig. 5) [25].
One variant, designated PG9_N100(F Y, possessed increased potency and was able to neutralize a diverse set of PG9-resistant HIV strains, including those lacking the Env N160 glycan, which is critical for PG9 binding.
