反应详情

A suspension of 5-bromo-2-chloro-N-(4-hydroxy-cyclohexyl)-benzenesulfonamide (Intermediate DJ) (0.1 g, 0.27 mmol), bis(pinacolato)diboron (0.07 g, 0.29 mmol), Pd(dppf)Cl2.DCM (0.011 g, 0.014 mmol) and potassium acetate (0.04 g, 0.40 mmol) in DME (3 ml) is heated at reflux for 1.5 hours. Pd(dppf)Cl2.DCM (0.011 g, 0.014 mmol), 2-amino-5-bromopyrazine (0.05 g, 0.29 mmol), 2M Na2CO3 (1.5 ml) and DME (1 ml) are added and the reaction heated at reflux for 1 hour. The reaction mixture is purified by reverse phase column chromatography (C18, 0-100% MeCN in water −0.1% TFA) to yield a solid which was dried in vacuo at 45° C. overnight to yield the title compound. 1H NMR (400 MHz, DMSO-6) δ 8.60 (1H, d), 8.55 (1H, d), 8.14 (1H, dd), 8.00 (1H, d), 7.85 (1H, d), 7.67 (1H, d), 7.14-6.45 (2H, br hump), 3.30-3.24 (1H, m), 3.02-2.93 (1H, m), 1.73-1.68 (2H, m), 1.64-1.60 (2H, m), 1.33-1.23 (2H, m) 1.10-1.00 (2H, m); MS m/z 383 [M+H]+

1. temperatureat reflux for 1.5 hours
2. temperaturethe reaction heated
3. temperatureat reflux for 1 hour
4. customThe reaction mixture is purified by reverse phase column chromatography (C18, 0-100% MeCN in water −0.1% TFA)
5. customto yield a solid which
6. customwas dried in vacuo at 45° C. overnight