N-bromobutanimide → [2-Amino-4-(4-fluoro-phenyl)-thiazol-5-yl]-(4-fluoro-phenyl)-methanone

참여 물질

반응 단계

1,3-Bis-(4-fluoro-phenyl)-propane-1,3-dione and NBS (1.05 eq) were heated neat at 60° C. for 10 minutes then cooled. The resulting mixture was dissolved in ethanol (0.2 M) and treated with thiourea (1.5 eq). It was heated at reflux for 15 hours and cooled to room temperature. It was evaporated to dryness and the residue was partioned between EtOAc and saturated NaHCO3. Organic fraction was dried over MgSO4, filtered and concentrated. The title compound was collected by trituration with heptanes. 1H NMR (400 MHz, DMSO-d6) 6.86-7.01 (m, 4H) 7.22-7.32 (m, 2H) 7.35-7.45 (m, 2H) 8.11 (br. s., 2H). LCMS Method A Rt=1.18 m/z 317.0 (M+1), 315 (M−1).

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