Dichloromethane → 3-[5-Amino-6-(pyridine-3-carbonyl)-pyrazin-2-yl]-N-(2-methoxy-ethyl)-benzenesulfonamide

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반응 단계

A suspension of (3-Amino-6-bromo-pyrazin-2-yl)-pyridin-3-yl-methanone (Intermediate AA) (0.05 g, 0.18 mmol), bis(pinacolato)diboron (0.05 g, 0.19 mmol), Pd(dppf)Cl2.DCM (0.015 g, 0.018 mmol) and potassium acetate (0.03 g, 0.27 mmol) in DME (4 ml) is heated at reflux for 4 hours. Pd(dppf)Cl2.DCM (7 mg, 0.009 mmol), 3-Bromo-N-(2-methoxy-ethyl)-benzenesulfonamide (Intermediate DD) (0.05 g, 0.18 mmol), 2M Na2CO3 (1 ml) and DME (3 ml) are added to the suspension, which is heated at reflux for a further 1 hour. After cooling, the reaction mixture is diluted with EtOAc, washed with water, dried (MgSO4) and filtered through a short pad of Celite® (filter material). The solvent is removed in vacuo, and the residue purified by flash column chromatography (SiO2, iso-hexane/EtOAc) to afford the title compound as a yellow solid. 1H NMR (400 MHz, DMSO-d6) δ 9.16 (2H, m), 8.86 (1H, dd), 8.43 (1H, dt), 8.37 (1H, m), 8.23 (3H, m), 7.85 (1H, m), 7.77 (1H, m), 7.66 (1H, ddd), 3.38 (2H, t), 3.22 (3H, s), 3.01 (2H, m). MS m/z 414.01 [M+H]+

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