Dimethylformamide → N-{1-[(3-hydroxy-2-pyridinyl)methyl]-1H-pyrazol-3-yl}acetamide

Participants

Reaction Conditions

Reaction Steps

Intermediate 1 (200 mg, 1.598 mmol) was dissolved in 2 mL of anhydrous DMF at 0° C. Sodium hydride (ALDRICH, 48.5 mg, 1.920 mmol) was added and mixture of reaction was stirred at 0° C. for 20 minutes. 2-(Bromomethyl)-3-pyridinol hydrobromide (ALFAAESAR, 301 mg, 1.598 mmol) was dissolved in 2 mL of DMF (anh) at 0° C. Sodium hydride (ALDRICH, 48.5 mg, 1.920 mmol) was added and this solution was stirred at 0° C. for 20 minutes. Solution of 2-(bromomethyl)-3-pyridinol was added dropwise to reaction mixture. Reaction was stirred at 80° C. for 24 h. Solvent was evaporated to dryness. Residue was partitioned between EtOAc and NH4Cl. Organic layer was dried over MgSO4 (anh), filtered and concentrated to dryness. Residue was purified using silica chromatography column using a linear gradient of DCM/MeOH as eluents to give the title compound (48.5 mg, 0.207 mmol, 13% yield). 1H NMR (300 MHz, CDCl3) δ ppm: 9.70 (br s, 1H), 8.04 (m, 1H), 7.46 (d, 1H), 7.33 (m, 1H), 7.24 (m, 1H), 6.53 (d, 1H), 5.42 (s, 2H), 2.27 (s, 3H). [ES+MS] m/z 233 (MH+).

Provenance & Evidence