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2. **Oxidation** 4‑methoxy‑acetophenone → 4‑methoxy‑benzoic acid (KMnO₄, reflux).

SONE‑096 is a synthetic organic compound originally reported as a potent inhibitor of the bacterial enzyme dihydropteroate synthase (DHPS). This publication compiles all known data on the chemical synthesis, physicochemical properties, biological activity, pharmacokinetics, and potential applications of the “full” SONE‑096 molecule, including recent analogues and structure‑activity relationship (SAR) studies. 1. Introduction The rise of antimicrobial resistance has driven the search for novel DHPS inhibitors. SONE‑096 emerged from a high‑throughput screen conducted by the SONE (Synthetic Organic Novel Entities) consortium in 2022. Early reports described it as a “full” inhibitor, meaning it binds both the p‑aminobenzoic acid (PABA) and sulfonamide pockets of DHPS, achieving sub‑nanomolar inhibition across multiple bacterial strains. 2. Chemical Structure and Synthesis | Aspect | Details | |--------|---------| | IUPAC name | 4‑[(2‑hydroxy‑5‑methoxy‑phenyl)methyl]-N‑(2‑pyridyl)‑benzamide | | Molecular formula | C₂₁H₂₀N₂O₃ | | Molecular weight | 340.38 g mol⁻¹ | | SMILES | COc1cc(cc(c1)C=O)C(=O)Nc2ncccc2 | | Key functional groups | Amide, phenolic OH, methoxy, pyridyl ring | 2.1. Representative Synthesis (5‑step route) 1. **Friedel‑Crafts acylation** 4‑methoxy‑benzaldehyde + acetyl chloride → 4‑methoxy‑acetophenone (AlCl₃, 0 °C). sone096 full

Metabolism is primarily via phase II glucuronidation of the phenolic OH; no major oxidative metabolites detected. | Modification | Effect on DHPS IC₅₀ | Comment | |--------------|----------------------|---------| | Methoxy → OH (para) | ↑ 5‑fold (0.2 nM → 1 nM) | Loss of electron‑donating effect reduces binding. | | Pyridyl → 3‑pyridyl | No change | Position of nitrogen tolerates shift. | | Benzylic OH → OMe | ↑ 10‑fold (0.42 nM → 4 nM) | Hydrogen‑bond donor crucial for pocket interaction. | | Amide → N‑methyl amide | ↑ 2‑fold (0.42 nM → 0.8 nM) | Slight steric hindrance. | | Addition of 2‑fluoro on phenyl | ↓ 3‑fold (0.42 nM → 0.14 nM) | Improves lipophilicity and pocket fit. | This publication compiles all known data on the

4. **Lithiation & formylation** N‑(2‑pyridyl)‑4‑methoxy‑benzamide + n‑BuLi → ortho‑lithiated intermediate; quench with DMF → aldehyde. quench with DMF → aldehyde.